:root{
  --color-bg:#F8F3E7;
  --color-hero-top:#FBF7EE;
  --color-hero-bottom:#F3ECDC;
  --color-panel:#FDFAF3;
  --color-panel-soft:#F1EADA;
  --color-border:#E3D9C4;
  --color-accent:#14323A;
  --color-accent-light:#1F4B56;
  --color-accent-dark:#0B2027;
  --color-text:#22190F;
  --color-muted:#6F6353;
  --color-success:#3A7D4F;
  --color-warning:#B8860B;
  --color-error:#A83A2E;
  --color-on-accent:#FDFAF3;
  --color-focus:#1F4B56;
  --color-highlight:rgba(255,255,255,.7);
  --color-shadow:rgba(20,50,58,.12);
  --color-shadow-strong:rgba(20,50,58,.22);
  --color-accent-fill:rgba(20,50,58,.06);
  --color-accent-line:rgba(20,50,58,.28);
  --color-success-fill:rgba(58,125,79,.12);
  --color-success-ring:rgba(58,125,79,.35);
  --color-grid:rgba(34,25,15,.055);
  --color-ink-line:rgba(34,25,15,.09);
  --color-ink-shadow:rgba(34,25,15,.06);
  --color-header:rgba(251,247,238,.82);
  --color-flag-red:#C8352B;
  --color-flag-blue:#1E3F8A;
  --color-flag-white:#FFFFFF;
  --color-flag-gold:#E0B21E;
  --color-flag-black:#1A1A1A;
  --font-display:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,monospace;
  --radius:8px;
  --radius-small:6px;
  --radius-pill:999px;
  --header-height:64px;
  --content-width:1200px;
  --reading-width:780px;
  --gutter:32px;
  --section-space:96px;
  --toc-offset:82px;
  --shadow-panel:0 1px 0 var(--color-highlight) inset,0 24px 48px -24px var(--color-shadow),0 8px 18px -10px var(--color-ink-shadow);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 16px)}
html.nav-open{overflow:hidden}
body{margin:0;min-width:320px;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-wrap:break-word}
body,main,section,article,header,footer,nav,div{min-width:0}
img,svg,video,canvas{display:block;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit}
button{color:inherit}
a{color:inherit;text-decoration:none}
p,h1,h2,h3,h4,ul,ol,dl,figure,blockquote{margin-top:0}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--color-text);line-height:1.18;text-wrap:balance}
h1{font-size:clamp(52px,6vw,72px);letter-spacing:-.02em}
h2{font-size:clamp(32px,4vw,48px);letter-spacing:-.018em}
h3{font-size:clamp(21px,2.4vw,28px);letter-spacing:-.012em}
p{color:var(--color-muted)}
strong{color:var(--color-text)}
code,kbd,samp{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-panel-soft);color:var(--color-text);-webkit-overflow-scrolling:touch}
pre code{overflow-wrap:normal}
table{border-collapse:collapse}
ul,ol{padding-left:1.25rem}
::selection{background:var(--color-accent);color:var(--color-on-accent)}
:where(a,button,input,select,textarea,summary,[role="tab"]):focus-visible{outline:2px solid var(--color-focus);outline-offset:3px}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.reading{width:100%;max-width:var(--reading-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section-compact{padding-top:64px;padding-bottom:64px}
.section-head{max-width:760px;margin-bottom:44px}
.section-head p{font-size:18px}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--color-muted)}
.no-break{white-space:nowrap}
.muted{color:var(--color-muted)}
.mono{font-family:var(--font-mono)}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.skip-link{position:fixed;left:var(--gutter);top:8px;z-index:1000;transform:translateY(-150%);padding:8px 14px;border-radius:var(--radius);background:var(--color-accent);color:var(--color-on-accent)}
.skip-link:focus{transform:none}
.badge{display:inline-flex;align-items:center;gap:8px;min-height:26px;max-width:100%;padding:3px 11px;border:1px solid var(--color-border);border-radius:var(--radius-pill);background:var(--color-panel);color:var(--color-muted);font-size:12px;font-weight:600;overflow:hidden}
.badge-accent{border-color:var(--color-accent-line);background:var(--color-accent-fill);color:var(--color-accent)}
.badge-success{border-color:var(--color-success-ring);background:var(--color-success-fill);color:var(--color-success)}
.live-dot{position:relative;width:7px;height:7px;border-radius:50%;background:var(--color-success);flex:0 0 auto}
.live-dot::after{content:"";position:absolute;inset:-4px;border:1px solid var(--color-success-ring);border-radius:50%;animation:live-pulse 2.4s ease-out infinite}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:24px;min-height:46px;padding:10px 24px;border:1px solid transparent;border-radius:var(--radius-pill);font-weight:650;line-height:1.2;cursor:pointer;transition:transform .18s ease,box-shadow .18s ease,background-color .18s ease,border-color .18s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(180deg,var(--color-accent-light),var(--color-accent));color:var(--color-on-accent);box-shadow:0 1px 0 var(--color-highlight) inset,0 12px 24px -10px var(--color-shadow-strong)}
.btn-secondary{border-color:var(--color-accent);background:transparent;color:var(--color-accent)}
.btn-secondary:hover{background:var(--color-accent-fill)}
.btn-small{min-height:36px;padding:7px 16px;font-size:13px}
.panel,.card{border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-panel);box-shadow:var(--shadow-panel)}
.card{padding:24px}
.two-tone{max-width:980px;color:var(--color-muted);font-family:var(--font-display);font-size:clamp(24px,3vw,34px);font-weight:600;line-height:1.38;letter-spacing:-.018em}
.two-tone .ink{color:var(--color-text)}
.reveal{transition:opacity .58s ease,transform .58s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.site-head{position:sticky;top:0;z-index:80;height:var(--header-height);border-bottom:1px solid var(--color-ink-line);background:var(--color-header);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.head-inner{height:var(--header-height);display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;min-height:44px;flex:0 0 auto}
.brand img{width:28px;height:28px;border-radius:7px}
.brand-word{font-family:var(--font-display);font-size:17px;font-weight:700;letter-spacing:-.01em}
.brand-local{color:var(--color-muted);font-size:14px;font-weight:500}
.site-nav{display:flex;align-items:center;gap:28px;margin-left:auto}
.site-nav a{display:inline-flex;align-items:center;min-height:44px;color:var(--color-muted);font-size:14px;font-weight:500}
.site-nav a:hover,.site-nav a.is-active{color:var(--color-text)}
.site-nav a.is-active{font-weight:650}
.head-tools{display:flex;align-items:center;gap:10px;flex:0 0 auto;padding-left:20px;border-left:1px solid var(--color-border)}
.login-link{display:inline-flex;align-items:center;justify-content:center;min-height:32px;padding:6px 14px;border-radius:var(--radius-pill);background:var(--color-accent);color:var(--color-on-accent);font-size:13px;font-weight:650}
.lang-switch{position:relative}
.lang-button,.menu-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:0;background:transparent;color:var(--color-muted);cursor:pointer}
.lang-button{gap:5px;font-size:13px}
.lang-menu{position:absolute;top:calc(100% + 8px);right:0;z-index:95;width:158px;padding:6px;border:1px solid var(--color-border);border-radius:var(--radius);background:var(--color-panel);box-shadow:var(--shadow-panel)}
.lang-menu[hidden]{display:none}
.lang-menu a{display:flex;align-items:center;min-height:40px;padding:7px 10px;border-radius:var(--radius-small);color:var(--color-muted);font-size:13px}
.lang-menu a:hover,.lang-menu a[aria-current="true"]{background:var(--color-panel-soft);color:var(--color-text)}
.menu-toggle{display:none}
.menu-toggle-lines,.menu-toggle-lines::before,.menu-toggle-lines::after{display:block;width:19px;height:1px;background:var(--color-text);content:"";transition:transform .18s ease}
.menu-toggle-lines::before{transform:translateY(-6px)}
.menu-toggle-lines::after{transform:translateY(5px)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines{background:transparent}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::before{transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-toggle-lines::after{transform:translateY(-1px) rotate(-45deg)}
.mobile-nav{display:none}
.nav-veil{display:none}
.site-footer{border-top:1px solid var(--color-border);background:var(--color-panel-soft)}
.footer-main{display:grid;grid-template-columns:1.35fr 1fr 1.3fr;gap:56px;padding-top:64px;padding-bottom:48px}
.footer-brand p{max-width:420px;margin-top:16px}
.footer-title{margin-bottom:14px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--color-muted);text-transform:uppercase}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 18px}
.footer-links a,.footer-languages a{display:inline-flex;align-items:center;min-height:32px;color:var(--color-muted);font-size:13px}
.footer-links a:hover,.footer-languages a:hover{color:var(--color-text)}
.footer-keywords{display:flex;flex-wrap:wrap;gap:8px}
.footer-keywords a{display:inline-flex;align-items:center;min-height:32px;max-width:100%;padding:4px 10px;border:1px solid var(--color-border);border-radius:var(--radius-pill);background:var(--color-panel);color:var(--color-muted);font-size:12px;overflow:hidden}
.footer-languages{display:flex;flex-wrap:wrap;gap:4px 18px;margin-top:22px}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-top:20px;padding-bottom:24px;border-top:1px solid var(--color-border);color:var(--color-muted);font-size:12px}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
#server-status{position:relative;display:block;width:100%;max-width:100%;overflow:hidden;margin-bottom:48px}
#server-status+.section,#server-status+section{margin-top:0}
.prose{font-size:17px}
.prose h2{margin-top:2.2em}
.prose h3{margin-top:1.7em}
.prose p,.prose li{color:var(--color-muted)}
.prose a{text-decoration:underline;text-decoration-color:var(--color-accent-line);text-underline-offset:3px}
.prose img{border-radius:var(--radius)}
.prose blockquote{margin-inline:0}
body:has(.toc-tabs) section[id]{scroll-margin-top:var(--toc-offset)}
@keyframes live-pulse{0%{opacity:.9;transform:scale(.6)}100%{opacity:0;transform:scale(1.6)}}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}
@media (max-width:1100px){
  .site-nav{gap:18px}
  .head-inner{gap:18px}
  .head-tools{padding-left:12px}
}
@media (max-width:900px){
  :root{--gutter:24px;--section-space:80px}
  .site-nav,.desktop-language{display:none}
  .head-tools{margin-left:auto;border-left:0;padding-left:0}
  .menu-toggle{display:inline-flex}
  .mobile-nav{position:fixed;display:none;left:0;right:0;top:var(--header-height);z-index:92;max-height:calc(100dvh - var(--header-height));padding:10px var(--gutter) 18px;overflow-y:auto;overscroll-behavior:contain;border-bottom:1px solid var(--color-border);background:var(--color-panel)}
  .mobile-nav.is-open{display:block}
  .mobile-nav a{display:flex;align-items:center;width:100%;min-height:48px;padding:10px 8px;border-bottom:1px solid var(--color-ink-line);color:var(--color-muted)}
  .mobile-nav a.is-active{color:var(--color-text);font-weight:650}
  .mobile-language{margin-top:12px}
  .mobile-language a{font-size:13px}
  .nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:70;background:var(--color-shadow-strong)}
  .nav-veil.is-open{display:block}
  .footer-main{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:768px){
  h1{font-size:clamp(28px,10vw,40px);line-height:1.12}
  h2{font-size:clamp(28px,8vw,38px)}
  .footer-main{grid-template-columns:1fr;gap:36px}
  .footer-brand{grid-column:auto}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media (max-width:640px){
  :root{--gutter:16px;--section-space:64px}
  .no-break{white-space:normal}
  .tilt,[class*="tilt-"]{transform:none!important}
  .absolute-decoration,.stripe-halo,[class*="halo"]{max-width:100%;overflow:hidden}
  .card{padding:20px}
  .footer-links{grid-template-columns:1fr 1fr}
}