:root{
  --bg:#ECEAF8;
  --panel:#F8F7FE;
  --panel-2:#DFDCF1;
  --border:#CFCAE6;
  --accent:#F5BD02;
  --accent-dark:#7C5A00;
  --text:#1C1838;
  --muted:#5B5677;
  --success:#1F9D6B;
  --warn:#E07A12;
  --error:#D2384B;
  --white:#FFFFFF;
  --violet:#5B4BD6;
  --violet-2:#8D7BF0;
  --periwinkle:#6F86E8;
  --periwinkle-2:#93A6F2;
  --ink-2:#2A2160;
  --ink-3:#4B3FA8;
  --success-2:#38B886;
  --hero-top:#F4F3FD;
  --hero-bottom:#E3E0F4;
  --tint:#EEECFB;
  --hex-1:#D6D1F2;
  --hex-2:#A89BEA;
  --hex-3:#3F357F;
  --side-icon:#9A93C9;
  --line-soft:rgba(91,75,214,.12);
  --glow-spot:rgba(91,75,214,.06);
  --glow-06:rgba(91,75,214,.06);
  --glow-12:rgba(91,75,214,.12);
  --glow-14:rgba(91,75,214,.14);
  --glow-22:rgba(91,75,214,.22);
  --hi:rgba(255,255,255,.92);
  --hi-soft:rgba(255,255,255,.55);
  --hi-edge:rgba(255,255,255,.5);
  --hi-dark:rgba(255,255,255,.12);
  --sheen:rgba(255,255,255,.28);
  --sheen-weak:rgba(255,255,255,.1);
  --glass:rgba(248,247,254,.66);
  --on-dark-muted:rgba(255,255,255,.8);
  --success-soft:rgba(31,157,107,.12);
  --success-ring:rgba(31,157,107,.24);
  --accent-edge:rgba(124,90,0,.22);
  --accent-glow:rgba(124,90,0,.3);
  --shadow-ink:rgba(28,24,56,.25);
  --flag-red:#D52B3A;
  --flag-blue:#2D3C8E;
  --flag-green:#1E8C55;
  --flag-white:#FFFFFF;
  --flag-edge:rgba(28,24,56,.18);
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","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;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:12px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:24px;
  --wrap:1200px;
  --head-height:60px;
  --header-edge:94px;
  --anchor-gap:110px;
  --toc-gap:174px;
  --shadow-panel:inset 0 1px 0 var(--hi),0 0 0 1px var(--line-soft),0 18px 40px -16px var(--glow-12);
  --ease-out:cubic-bezier(.2,.65,.3,1);
}
*{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:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
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}
ul{list-style:none;margin:0;padding:0}
p{margin:0 0 1em}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1{margin:14px 0 0;font-weight:900;font-size:64px;line-height:1.1;letter-spacing:-.02em}
h2{margin:0 0 24px;font-size:34px;line-height:1.25;letter-spacing:-.015em;font-weight:800}
h3{margin:0 0 12px;font-size:21px;line-height:1.4;font-weight:750}
h4{font-size:16px;margin:0 0 12px}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--violet);outline-offset:3px}
:where(button,summary){min-height:24px}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:64px;padding-bottom:64px}
.section-heading{max-width:780px;margin-bottom:32px}
.section-heading p{color:var(--muted);font-size:17px}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.flow>*+*{margin-top:24px}
.panel{background:var(--panel);border-radius:var(--r-md);padding:24px;box-shadow:var(--shadow-panel);min-width:0}
.muted{color:var(--muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.icon{width:20px;height:20px;display:inline-block;vertical-align:middle;flex-shrink:0}
.prose{min-width:0;max-width:850px;margin-inline:auto;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.9}
.prose h2{margin-top:48px}
.prose h3{margin-top:32px}
.prose ul{list-style:disc;padding-left:1.4em}
.prose ol{padding-left:1.5em}
.prose li+li{margin-top:8px}
.prose a{color:var(--violet);text-decoration:underline;text-underline-offset:3px}
code{font-family:var(--font-mono);overflow-wrap:anywhere;background:var(--tint);border-radius:var(--r-xs);padding:.1em .3em;font-size:.9em}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--text);color:var(--panel);border-radius:var(--r-md);line-height:1.7}
pre code{background:var(--clear);padding:0;color:inherit;white-space:pre;overflow-wrap:normal}
.decorative-section{position:relative;overflow-x:clip}
#server-status{position:relative;display:block;min-width:0;max-width:100%;min-height:80px;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
.reveal{transition:opacity .35s var(--ease-out),transform .35s var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 28px;border:0;border-radius:var(--r-md);font-size:16px;font-weight:700;letter-spacing:.01em;line-height:1.4;flex-shrink:0;white-space:nowrap;transition:transform .15s var(--ease-out),background .15s var(--ease-out)}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--accent);color:var(--text);box-shadow:inset 0 1px 0 var(--hi-soft),0 0 0 1px var(--accent-edge),0 12px 24px -10px var(--accent-glow)}
.btn-ghost,.btn-secondary{background:var(--clear);color:var(--text);box-shadow:inset 0 0 0 1.5px var(--text)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--panel)}
.btn-ink{background:var(--text);color:var(--white);box-shadow:inset 0 1px 0 var(--hi-dark),0 8px 18px -10px var(--glow-22)}
.btn-ink:hover{background:var(--ink-2)}
.btn-small{min-height:40px;font-size:14px;padding:9px 18px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;transform:none;box-shadow:none}
.cta-row{margin-top:16px;display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.topbar{background:linear-gradient(90deg,var(--violet),var(--periwinkle));color:var(--white);text-align:center;font-size:13px;font-weight:600;line-height:34px;letter-spacing:.02em;padding:0 16px;box-shadow:inset 0 -1px 0 var(--hi-dark)}
.fold{background:linear-gradient(180deg,var(--hero-top) 0%,var(--bg) 48%,var(--hero-bottom) 100%)}
#site-header{position:relative;z-index:100}
.site-head{position:relative;z-index:100;border-bottom:1px solid var(--line-soft)}
.nav-inner{max-width:1280px;margin:0 auto;padding:0 40px;height:var(--head-height);display:flex;align-items:center;gap:36px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--text);flex-shrink:0;white-space:nowrap}
.brand img{width:30px;height:30px;flex-shrink:0}
.nav{flex:1;min-width:0}
.nav-list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav-list>li>a,.more-btn{position:relative;display:inline-flex;align-items:center;gap:4px;min-height:36px;padding:0 12px;border-radius:var(--r-sm);font-size:14.5px;font-weight:500;color:var(--muted);white-space:nowrap}
.more-btn{background:none;border:0;font-family:inherit;cursor:pointer;list-style:none}
.more-btn::-webkit-details-marker{display:none}
.more-btn svg{width:12px;height:12px}
.nav-list>li>a:hover,.more-btn:hover{color:var(--text);background:var(--glow-06)}
.nav-list>li>a.is-active{color:var(--text);font-weight:650}
.nav-list>li>a.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:3px;height:2px;border-radius:var(--r-xs);background:var(--violet)}
.nav-more{position:relative}
.more-panel{position:absolute;z-index:120;top:calc(100% + 8px);left:0;min-width:280px;display:none;grid-template-columns:1fr 1fr;gap:12px;padding:14px;background:var(--panel);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.nav-more.is-open .more-panel,.nav-more[open] .more-panel{display:grid}
.more-label{margin:0 0 4px;padding:0 8px;font-family:var(--font-mono);font-size:10.5px;letter-spacing:.06em;color:var(--muted)}
.more-group{min-width:0}
.more-group a{display:flex;align-items:center;min-height:36px;padding:6px 8px;border-radius:var(--r-xs);font-size:14px;color:var(--text)}
.more-group a:hover,.more-group a.is-active{background:var(--tint)}
.nav-tools{margin-left:auto;display:flex;align-items:center;gap:10px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:36px;min-width:44px;width:auto;padding:0 10px;border:0;background:none;font-family:inherit;font-size:14px;color:var(--muted);cursor:pointer;border-radius:var(--r-sm)}
.lang span{white-space:nowrap}
.lang:hover{background:var(--glow-06);color:var(--text)}
.lang svg{width:16px;height:16px}
.lang .caret{width:11px;height:11px}
.lang-panel{display:none;position:absolute;z-index:140;right:0;top:calc(100% + 8px);min-width:180px;padding:8px;background:var(--panel);border-radius:var(--r-md);box-shadow:var(--shadow-panel)}
.language.is-open .lang-panel{display:block}
.lang-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--r-xs)}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--tint);color:var(--text)}
.login{display:inline-flex;align-items:center;justify-content:center;min-height:36px;padding:0 18px;border-radius:var(--r-sm);background:var(--text);color:var(--white);font-size:14px;font-weight:600;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hi-dark),0 8px 18px -10px var(--glow-22)}
.login:hover{background:var(--ink-2)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;border:0;background:var(--clear);color:var(--text);border-radius:var(--r-sm)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-xs)}
.menu-toggle[aria-expanded="true"] .menu-line:first-child{transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .menu-line:last-child{transform:translateY(-6px) rotate(-45deg)}
.mobile-drawer{display:none}
.menu-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--line-soft);background:linear-gradient(180deg,var(--panel),var(--panel-2));padding-top:48px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}
.footer-brand{min-width:0}
.footer-brand p{max-width:340px;color:var(--muted);margin-top:16px}
.footer-title{font-size:14px;font-weight:750;margin:0 0 12px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 16px}
.footer-links a,.footer-languages a,.legal-links a{display:inline-flex;align-items:center;min-height:32px;font-size:13px;color:var(--muted)}
.footer-links a:hover,.footer-languages a:hover,.legal-links a:hover{color:var(--violet);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px;padding-top:20px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;margin-top:16px;font-size:12px;color:var(--muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:16px}
@media(max-width:1100px){
  .nav-inner{gap:20px;padding-inline:24px}
  .nav-list>li>a,.more-btn{padding-inline:10px}
}
@media(max-width:960px){
  .nav{display:none}
  .nav-inner{padding-inline:20px;gap:16px}
  .nav-tools{margin-left:auto}
  .menu-toggle{display:flex}
  .mobile-drawer{position:fixed;z-index:98;top:var(--header-edge);left:0;right:0;height:calc(100dvh - var(--header-edge));max-height:calc(100dvh - var(--header-edge));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);padding:20px var(--gutter) 40px}
  .mobile-drawer.is-open{display:block}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 14px;border-radius:var(--r-sm);color:var(--text)}
  .mobile-drawer a:hover,.mobile-drawer a.is-active{background:var(--tint)}
  .drawer-label{margin:20px 14px 8px;color:var(--muted);font-size:12px;font-family:var(--font-mono)}
  .menu-veil{position:fixed;z-index:97;inset:var(--header-edge) 0 0;background:var(--shadow-ink);border:0}
  .menu-veil.is-open{display:block}
}
@media(max-width:768px){
  :root{--gutter:16px}
  h1{font-size:40px;line-height:1.15}
  h2{font-size:28px}
  .section{padding-top:40px;padding-bottom:40px}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
  .nav-inner{padding-inline:16px;gap:12px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .grid-2{grid-template-columns:1fr}
  .tilt,.decorative-tilt{transform:none}
  .decorative-section>*{max-width:100%}
  .panel{padding:20px}
  .nav-inner{gap:6px;padding-inline:16px}
  .brand{font-size:16px;gap:6px}
  .brand img{width:26px;height:26px}
  .nav-tools{margin-left:auto;gap:4px}
  .login{padding-inline:12px;font-size:13px}
  .lang{padding-inline:5px;font-size:11px;gap:3px}
  .lang svg{width:13px;height:13px}
  .lang .caret{display:none}
  .topbar{font-size:10px;padding-inline:8px;letter-spacing:0}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
}
@media(max-width:359px){
  .brand{font-size:14px;gap:4px}
  .brand img{width:24px;height:24px}
  .login{padding-inline:9px}
  .lang{font-size:10px}
  .lang>svg{display:none}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}