:root{
  --bg:#FBFAF8;
  --bg-panel:#FFFFFF;
  --bg-panel-2:#F4F1EC;
  --border:#E6E2DA;
  --accent:#1D5E48;
  --accent-dark:#123E31;
  --text:#17261F;
  --text-muted:#5B6660;
  --success:#2A8A5E;
  --warn:#B7791F;
  --error:#C2412D;
  --apricot:#F6E3CC;
  --apricot-line:#E6C59D;
  --flag-red:#D52B1E;
  --flag-blue:#2B3A75;
  --flag-navy:#1E2A66;
  --flag-white:#FFFFFF;
  --flag-edge:color-mix(in srgb,var(--text) 16%,transparent);
  --la-1:#C98DA0;
  --la-2:#EBA38A;
  --la-3:#F3BC7E;
  --la-4:#F8D9A6;
  --la-sun:#FCEBC6;
  --la-far:#9A5F66;
  --la-sil:#4B2C3A;
  --ty-1:#2F3768;
  --ty-2:#5B5590;
  --ty-3:#B07E9E;
  --ty-4:#E7A99A;
  --ty-mid:#3A3F70;
  --ty-sil:#1D2246;
  --ty-lit:#F6E3CC;
  --sg-1:#E3A766;
  --sg-2:#EFC085;
  --sg-3:#F6DAA8;
  --sg-sun:#FCEBC6;
  --sg-mid:#A8754A;
  --sg-sil:#6A4528;
  --sg-water:#C98F55;
  --sg-water-2:#A9733F;
  --sg-shine:#FBE7C2;
  --sy-1:#8DA3C6;
  --sy-2:#C3A6C0;
  --sy-3:#EBB9B3;
  --sy-4:#F4D2C2;
  --sy-bridge:#53617F;
  --sy-base:#8B7F86;
  --sy-sail:#F8F3EC;
  --sy-sail-sh:#D6C4C3;
  --sy-water:#6E86AC;
  --sy-water-2:#56709A;
  --font-display:Georgia,'Noto Serif SC','Source Han Serif SC','Songti SC','STSong','Times New Roman',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;
  --r-xs:4px;
  --r-sm:6px;
  --r-inset:8px;
  --r-md:10px;
  --r-lg:12px;
  --r-pill:999px;
  --r-circle:50%;
  --shadow-card:0 26px 56px -20px color-mix(in srgb,var(--accent) 12%,transparent),0 8px 20px -10px color-mix(in srgb,var(--accent) 12%,transparent);
  --shadow-post:0 22px 44px -22px color-mix(in srgb,var(--accent-dark) 22%,transparent),0 4px 10px -6px color-mix(in srgb,var(--accent-dark) 12%,transparent);
  --shadow-tag:0 12px 26px -16px color-mix(in srgb,var(--accent) 30%,transparent);
  --shadow-hover:0 30px 64px -20px color-mix(in srgb,var(--accent) 18%,transparent);
  --shadow-button:0 12px 26px -12px color-mix(in srgb,var(--accent) 60%,transparent),inset 0 1px 0 color-mix(in srgb,var(--bg-panel) 22%,transparent);
  --shadow-float:0 16px 32px -14px color-mix(in srgb,var(--accent) 70%,transparent),inset 0 1px 0 color-mix(in srgb,var(--bg-panel) 20%,transparent);
  --hl-edge:inset 0 1px 0 var(--bg-panel),inset 0 0 0 1px color-mix(in srgb,var(--bg-panel) 70%,transparent);
  --button-fill:linear-gradient(180deg,color-mix(in srgb,var(--accent) 86%,var(--success)) 0%,var(--accent) 55%,color-mix(in srgb,var(--accent) 82%,var(--accent-dark)) 100%);
  --gutter:24px;
  --wrap-width:1200px;
  --reading-width:800px;
  --header-height:72px;
  --anchor-gap:88px;
  --toc-offset:88px;
  --toc-landing:164px;
  --space-section:88px;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,4.6vw,66px);
  --size-h2:clamp(30px,3vw,44px);
  --size-h3:26px;
  --ease-ui:cubic-bezier(.2,.7,.2,1);
  --duration-ui:180ms;
  --duration-reveal:360ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
a{color:inherit;text-underline-offset:4px}
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}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:var(--r-xs)}
::selection{background:var(--apricot);color:var(--text)}
h1,h2,h3{font-family:var(--font-display);font-weight:400;line-height:1.2;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);margin:0 0 24px}
h3{font-size:var(--size-h3);margin:0 0 16px}
p{margin:0 0 20px}
ul,ol{padding-left:24px}
li+li{margin-top:6px}
.no-break{white-space:nowrap}
.kw{color:var(--accent)}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.wrap{width:100%;max-width:var(--wrap-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)}
.section-head{max-width:760px;margin-bottom:36px}
.section-head p{color:var(--text-muted)}
.grid{display:grid;gap:28px}
.grid>*{min-width:0}
.grid--three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid--five{grid-template-columns:repeat(5,minmax(0,1fr))}
.panel,.card{min-width:0;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--shadow-card),var(--hl-edge);padding:28px}
.card{transition:transform var(--duration-ui) var(--ease-ui),box-shadow var(--duration-ui) var(--ease-ui)}
@media(hover:hover){.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}}
.decorated-section{position:relative;overflow-x:clip}
.prose{min-width:0;overflow-wrap:break-word}
.prose h2{margin-top:56px}
.prose h3{margin-top:36px}
.prose p,.prose li{line-height:1.85}
.prose a{color:var(--accent);text-decoration-thickness:1px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere;background:var(--bg-panel-2);border-radius:var(--r-xs);padding:2px 5px}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:var(--r-md)}
pre code{padding:0;background:none;white-space:pre;overflow-wrap:normal}
.reveal{transition:opacity var(--duration-reveal) var(--ease-ui),transform var(--duration-reveal) var(--ease-ui)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:160px;max-width:100%;overflow:hidden;margin-top:28px;margin-bottom:32px}
#server-status+*{margin-top:32px}
#server-status>*{min-width:0;max-width:100%}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  min-width:172px;min-height:52px;padding:12px 30px;border:0;border-radius:var(--r-pill);
  font-size:16px;font-weight:500;line-height:1.5;text-decoration:none;white-space:nowrap;flex-shrink:0;
  transition:background var(--duration-ui),color var(--duration-ui),box-shadow var(--duration-ui);
}
.btn--ghost,.btn-secondary{border:1.5px solid var(--text);color:var(--text);background:transparent}
.btn--ghost:hover,.btn-secondary:hover{background:var(--text);color:var(--bg-panel)}
.btn--solid,.btn-primary{color:var(--bg-panel);background:var(--button-fill);box-shadow:var(--shadow-button)}
.btn--solid:hover,.btn-primary:hover{background:var(--accent-dark)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;box-shadow:none;cursor:not-allowed}
.btn--small{min-width:0;min-height:40px;padding:8px 18px;font-size:var(--size-small)}
.cta-pair{display:flex;justify-content:center;gap:16px;margin-bottom:32px;flex-wrap:wrap}
.ico{width:16px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.btn .ico{width:18px;height:18px}
.topbar{position:relative;z-index:50;height:var(--header-height);background:var(--bg-panel);border-bottom:1px solid var(--border)}
.topbar__in{max-width:1440px;height:100%;margin:0 auto;padding:0 40px;display:flex;align-items:center;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex:none;min-height:40px}
.brand__mark{width:32px;height:32px;display:block}
.brand__word{font-weight:700;font-size:19px;letter-spacing:.01em;white-space:nowrap}
.mainnav{margin-left:36px;flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.mainnav li{margin:0}
.mainnav a{display:inline-flex;align-items:center;gap:6px;padding:8px 10px;border-radius:var(--r-sm);font-size:14px;color:var(--text);text-decoration:none;white-space:nowrap;min-height:40px}
.mainnav a:hover{background:var(--bg-panel-2)}
.mainnav a[aria-current="page"]{color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent)}
.mainnav .ico{color:var(--accent)}
.topbar__end{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;min-height:40px;padding:0 12px;background:transparent;border:0;border-radius:var(--r-sm);font-size:14px;color:var(--text);cursor:pointer}
.lang:hover{background:var(--bg-panel-2)}
.lang__text{white-space:nowrap}
.lang__caret{font-size:11px;color:var(--text-muted)}
.lang-panel{position:absolute;right:0;top:calc(100% + 10px);z-index:70;min-width:180px;padding:8px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);box-shadow:var(--shadow-card)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:10px 14px;text-decoration:none;border-radius:var(--r-sm);white-space:nowrap}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel-2);color:var(--accent)}
.login{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 22px;border:1.5px solid var(--text);border-radius:var(--r-pill);font-size:14px;font-weight:500;text-decoration:none;color:var(--text);white-space:nowrap}
.login:hover{background:var(--text);color:var(--bg-panel)}
.menu-btn{display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);cursor:pointer}
.menu-btn .ico{width:22px;height:22px}
.mobile-drawer{position:fixed;top:var(--header-height);right:0;left:0;z-index:45;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:16px var(--gutter) 40px}
.mobile-drawer ul{list-style:none;margin:0;padding:0}
.mobile-drawer li{margin:0}
.mobile-drawer a{display:flex;align-items:center;gap:12px;width:100%;min-height:48px;padding:12px 16px;text-decoration:none;border-radius:var(--r-sm)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--bg-panel-2);color:var(--accent)}
.mobile-drawer__languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:40;background:color-mix(in srgb,var(--accent-dark) 25%,transparent);border:0}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border);padding-top:64px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:340px;margin-top:20px;color:var(--text-muted);font-size:var(--size-small)}
.footer-title{font-family:var(--font-body);font-size:15px;font-weight:600;margin:0 0 16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px;list-style:none;margin:0;padding:0}
.footer-links li{margin:0;min-width:0}
.footer-links a,.footer-languages a,.footer-bottom a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--size-small);text-decoration:none;overflow-wrap:anywhere}
.footer-links a:hover,.footer-languages a:hover,.footer-bottom a:hover{color:var(--accent);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:24px;font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
@media(max-width:1399px){.mainnav{margin-left:24px}.mainnav a{padding-inline:8px}}
@media(max-width:1279px){.topbar__in{padding-inline:32px}.mainnav a{font-size:13.5px;gap:5px}.topbar__end{gap:8px}}
@media(max-width:1199px){.lang__text,.lang__caret{display:none}}
@media(max-width:1100px){
  .mainnav{display:none}
  .menu-btn{display:inline-flex}
  .topbar__end{margin-left:auto}
}
@media(min-width:1101px){.mobile-drawer,.nav-veil{display:none}}
@media(max-width:768px){
  :root{--space-section:56px;--size-h1:clamp(28px,6vw,40px)}
  .grid--three{grid-template-columns:1fr}
  .grid--five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none}
  .decorated-section{max-width:100%}
  .topbar__in{padding-inline:16px}
  .topbar__end{gap:5px;margin-left:auto}
  .brand{gap:7px}
  .brand__word{font-size:17px}
  .brand__mark{width:28px;height:28px}
  .login{padding-inline:14px}
  .lang{padding-inline:6px}
  .panel,.card{padding:22px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(max-width:359px){
  :root{--gutter:16px}
  .topbar__in{padding-inline:12px}
  .topbar__end{gap:2px}
  .brand__word{font-size:16px}
  .brand{gap:5px}
  .login{padding-inline:11px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none}
  .card,.btn{transition:none}
}