:root{
  --color-bg:#DFEAF4;
  --color-panel:#F5F9FC;
  --color-slot:#CEDDEA;
  --color-border:#B7CADB;
  --color-accent:#4A2545;
  --color-accent-dark:#331630;
  --color-navy:#1F2C4D;
  --color-text:#16213A;
  --color-muted:#4F607A;
  --color-success:#2FA38A;
  --color-warning:#C98A1B;
  --color-error:#B93A3A;
  --color-lilac:#EDE3F0;
  --color-white:#FFFFFF;
  --color-hero-top:#E6F0F8;
  --color-hero-bottom:#D6E4F0;
  --color-panel-glass:rgba(245,249,252,.74);
  --color-border-soft:rgba(183,202,219,.60);
  --color-highlight:rgba(255,255,255,.85);
  --color-accent-10:rgba(74,37,69,.10);
  --color-accent-16:rgba(74,37,69,.16);
  --color-accent-30:rgba(74,37,69,.30);
  --color-accent-45:rgba(74,37,69,.45);
  --color-hatch:rgba(74,37,69,.035);
  --color-ink-06:rgba(22,33,58,.06);
  --color-ink-14:rgba(22,33,58,.14);
  --color-ink-25:rgba(22,33,58,.25);
  --color-dark-copy:rgba(255,255,255,.72);
  --color-success-halo:rgba(47,163,138,.18);
  --font-display:Georgia,'Iowan Old Style','Palatino Linotype','Songti SC','Noto Serif CJK SC','Source Han Serif SC',SimSun,serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans GB','Microsoft YaHei',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-mono:'JetBrains Mono','SFMono-Regular',Menlo,Consolas,'Liberation Mono',monospace;
  --radius-xs:6px;
  --radius-sm:10px;
  --radius-md:14px;
  --radius-lg:24px;
  --radius-pill:999px;
  --shadow-panel:0 22px 44px -10px var(--color-accent-10),0 2px 6px var(--color-ink-06),inset 0 0 0 1px var(--color-highlight);
  --shadow-panel-hover:0 28px 52px -10px var(--color-accent-16),0 2px 6px var(--color-ink-06),inset 0 0 0 1px var(--color-highlight);
  --shadow-small:0 10px 24px -10px var(--color-accent-16);
  --header-height:72px;
  --content-width:1200px;
  --wide-width:1440px;
  --gutter:clamp(16px,4vw,40px);
  --section-space:clamp(64px,9vw,112px);
}
*,
*::before,
*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 16px);background:var(--color-bg)}
body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-body);font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased;overflow-wrap:break-word}
body:has(.float-cta)::after{content:"";display:block;height:calc(88px + env(safe-area-inset-bottom,0px))}
html.nav-open{overflow:hidden}
img,svg,video{display:block;max-width:100%}
svg{flex-shrink:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit;text-decoration:none}
p,h1,h2,h3,h4,ul,ol,dl,dd,figure,blockquote{margin-top:0}
ul[role="list"],ol[role="list"]{padding:0;list-style:none}
code{font-family:var(--font-mono);overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border-radius:var(--radius-sm);background:var(--color-navy);color:var(--color-white)}
pre code{overflow-wrap:normal}
table{border-collapse:collapse}
h1,h2,h3,h4{color:var(--color-accent);font-family:var(--font-display);font-weight:400;text-wrap:balance}
h1{font-size:clamp(52px,5vw,72px);line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(34px,4vw,52px);line-height:1.16}
h3{font-size:clamp(24px,2.6vw,34px);line-height:1.25}
p{color:var(--color-muted)}
strong{color:var(--color-text)}
::selection{background:var(--color-lilac);color:var(--color-accent-dark)}
:where(a,button,input,select,textarea,summary,[role="tab"]):focus-visible{outline:2px solid var(--color-accent);outline-offset:3px}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-wide{width:100%;max-width:var(--wide-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space);overflow-x:clip}
.section-head{max-width:720px;margin-bottom:40px}
.section-head.center{margin-inline:auto;text-align:center}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--color-muted)}
.no-break{white-space:nowrap}
.muted{color:var(--color-muted)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.stack{display:grid;gap:20px}
.grid-2,.grid-3,.grid-4{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-2>*,.grid-3>*,.grid-4>*{min-width:0}
.panel-card{min-width:0;padding:24px;border:1px solid var(--color-border-soft);border-radius:var(--radius-md);background:var(--color-panel);box-shadow:var(--shadow-panel);transition:transform .2s ease,box-shadow .2s ease}
.panel-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-panel-hover)}
.badge,.chip{display:inline-flex;align-items:center;gap:8px;min-height:30px;max-width:100%;padding:4px 12px;border:1px solid var(--color-border-soft);border-radius:var(--radius-pill);background:var(--color-panel-glass);color:var(--color-text);font-size:12.5px}
.badge--lilac{background:var(--color-lilac);border-color:var(--color-lilac);color:var(--color-accent)}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--color-success);box-shadow:0 0 0 3px var(--color-success-halo);flex-shrink:0}
.button-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;min-width:24px;padding:10px 26px;border:1.5px solid transparent;border-radius:var(--radius-pill);font-weight:600;line-height:1.2;white-space:nowrap;transition:transform .2s ease,background-color .2s ease,color .2s ease,box-shadow .2s ease}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--color-accent);color:var(--color-panel);box-shadow:0 12px 26px -10px var(--color-accent-16)}
.btn-primary:hover{background:var(--color-accent-dark)}
.btn-secondary{border-color:var(--color-text);background:transparent;color:var(--color-text)}
.btn-secondary:hover{background:var(--color-text);color:var(--color-panel)}
.btn-small{min-height:40px;padding:8px 18px;font-size:14px}
.reveal{transition:opacity .65s ease,transform .65s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.site-header{position:sticky;top:0;z-index:80;height:var(--header-height);border-bottom:1px solid var(--color-slot);background:var(--color-panel-glass);backdrop-filter:blur(10px)}
.header-inner{height:100%;display:flex;align-items:center;gap:28px}
.brand-link{display:inline-flex;align-items:center;gap:10px;min-height:44px;flex-shrink:0}
.brand-logo{width:32px;height:32px}
.brand-word{font-family:var(--font-display);font-size:22px;line-height:1;color:var(--color-accent)}
.brand-local{padding-left:10px;border-left:1px solid var(--color-border);color:var(--color-muted);font-size:12px}
.desktop-nav{display:flex;align-items:center;gap:clamp(14px,2vw,28px);margin-left:8px}
.desktop-nav a{display:inline-flex;align-items:center;min-height:44px;font-size:14px;color:var(--color-text);opacity:.82}
.desktop-nav a:hover,.desktop-nav a.is-active{color:var(--color-accent);opacity:1}
.desktop-nav a.is-active{font-weight:700}
.header-tools{margin-left:auto;display:flex;align-items:center;gap:10px}
.login-link{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:8px 20px;border:1.5px solid var(--color-text);border-radius:var(--radius-pill);font-size:14px;font-weight:600}
.login-link:hover{background:var(--color-text);color:var(--color-panel)}
.language-menu{position:relative}
.language-toggle,.menu-toggle{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:0;background:transparent}
.language-toggle{gap:6px;color:var(--color-muted)}
.language-popover{position:absolute;right:0;top:calc(100% + 8px);min-width:152px;padding:8px;border:1px solid var(--color-border);border-radius:var(--radius-sm);background:var(--color-panel);box-shadow:var(--shadow-small)}
.language-popover[hidden]{display:none}
.language-popover a{display:flex;align-items:center;min-height:40px;padding:7px 10px;border-radius:var(--radius-xs)}
.language-popover a:hover,.language-popover a[aria-current="true"]{background:var(--color-lilac);color:var(--color-accent)}
.menu-toggle{display:none}
.menu-toggle-lines{position:relative;width:20px;height:14px;border-top:2px solid var(--color-text);border-bottom:2px solid var(--color-text)}
.menu-toggle-lines::after{content:"";position:absolute;left:0;right:0;top:5px;border-top:2px solid var(--color-text)}
.mobile-nav{display:none}
.nav-veil{display:none}
.site-footer{padding-top:64px;background:var(--color-navy);color:var(--color-white);overflow-x:clip}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:44px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-logo{width:34px;height:34px}
.footer-title{font-family:var(--font-display);font-size:22px}
.site-footer p,.site-footer a{color:var(--color-dark-copy)}
.site-footer a:hover{color:var(--color-white)}
.footer-heading{margin-bottom:14px;color:var(--color-white);font-family:var(--font-body);font-size:14px;font-weight:700}
.footer-links{display:grid;gap:8px;padding:0;list-style:none}
.footer-links a{display:inline-flex;align-items:center;min-height:28px}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;padding-top:20px;padding-bottom:24px;border-top:1px solid var(--color-accent-45);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
#server-status{position:relative;display:block;width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status+*{margin-top:32px}
body:has(.toc-tabs) section[id]{scroll-margin-top:140px}
@keyframes status-breathe{0%,100%{opacity:1}50%{opacity:.35}}
.status-dot.is-live{animation:status-breathe 3s ease-in-out infinite}
@media (max-width:1100px){
  .desktop-nav{display:none}
  .menu-toggle{display:inline-flex}
  .header-tools{margin-left:auto}
  .mobile-nav{position:fixed;top:var(--header-height);right:0;z-index:82;width:min(360px,100%);max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;padding:14px var(--gutter) 24px;background:var(--color-panel)}
  .mobile-nav.is-open{display:block}
  .mobile-nav ul{display:grid;margin:0;padding:0;list-style:none}
  .mobile-nav a{display:flex;align-items:center;width:100%;min-height:48px;padding:10px 8px;border-bottom:1px solid var(--color-slot)}
  .mobile-nav a.is-active{color:var(--color-accent);font-weight:700}
  .mobile-languages{margin-top:16px}
  .nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:79;background:var(--color-ink-25)}
  .nav-veil.is-open{display:block}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
  h1{font-size:clamp(28px,9.8vw,40px)}
  h2{font-size:clamp(30px,8vw,40px)}
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .language-toggle .language-label{display:none}
  .header-inner{gap:10px}
}
@media (max-width:640px){
  .no-break{white-space:normal}
  .grid-2,.grid-3,.grid-4,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .wrap,.wrap-wide{padding-inline:var(--gutter)}
  .brand-local{display:none}
  .login-link{padding-inline:14px}
  .panel-card{padding:20px}
  .button-row{align-items:stretch}
  .button-row .btn{flex:1 1 auto}
  .tilt,.tilt-left,.tilt-right{transform:none}
  [class*="halo"],[class*="decor"]{max-width:100%}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending{opacity:1;transform:none;transition:none}
  .status-dot.is-live{animation:none}
  .btn,.panel-card{transition:none}
}