:root{
  --bg:#ECEAF7;
  --bg-top:#F4F3FB;
  --bg-bottom:#E6E3F4;
  --panel:#F8F7FD;
  --card:#FFFFFF;
  --groove:#DFDCF0;
  --border:#D3CFE8;
  --card-edge:#ECE9F8;
  --accent:#E9622B;
  --accent-dark:#C24A17;
  --text:#1E1B33;
  --text-muted:#5D5978;
  --success:#2E9467;
  --warn:#C98A12;
  --error:#D23A3A;
  --mist:#8FB3E8;
  --mist-tint:#DCE7F8;
  --lavender:#B9A8E6;
  --lavender-tint:#E8E2F8;
  --sage:#7FBF9E;
  --sage-tint:#DCEFE5;
  --apricot:#F8CDAE;
  --apricot-deep:#F19A69;
  --flag-red:#D6283C;
  --flag-white:#FFFFFF;
  --flag-blue:#233C8E;
  --clear:transparent;
  --glow-warm:rgb(241 154 105 / .05);
  --glow-cool:rgb(120 188 232 / .04);
  --veil:rgb(30 27 51 / .28);
  --shadow-card:0 34px 70px -30px rgb(233 98 43 / .10),0 14px 32px -20px rgb(233 98 43 / .10),0 2px 4px rgb(93 89 120 / .05);
  --shadow-float:0 16px 30px -16px rgb(233 98 43 / .16),0 3px 8px rgb(93 89 120 / .08);
  --shadow-soft:0 6px 16px -10px rgb(93 89 120 / .22);
  --shadow-ink:0 18px 34px -16px rgb(30 27 51 / .45);
  --shadow-logo:0 6px 10px rgb(233 98 43 / .18);
  --shadow-shield:0 8px 10px rgb(46 148 103 / .18);
  --shadow-cue:0 -6px 14px -10px rgb(93 89 120 / .35);
  --cta-glow:0 12px 22px -12px rgb(233 98 43 / .60);
  --gloss:inset 0 1px 0 rgb(255 255 255 / .30);
  --radius-xl:28px;
  --radius-sheet:40px;
  --radius-pill:999px;
  --radius-round:50%;
  --radius-line:3px;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-h1:64px;
  --fs-h2:40px;
  --fs-h3:24px;
  --fs-lede:20px;
  --fs-body:17px;
  --fs-small:14px;
  --weight-normal:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --tracking-title:-.02em;
  --gutter:24px;
  --content:1160px;
  --header-height:72px;
  --anchor-offset:92px;
  --toc-offset:152px;
  --space-section:80px;
  --speed:.2s;
  --speed-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-underline-offset:.2em}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img,svg{vertical-align:middle;max-width:100%}
img{height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--mist);outline-offset:3px;border-radius:var(--radius-line)}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-bold);letter-spacing:var(--tracking-title);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,68px);line-height:1.14;margin:0 0 24px}
h2{font-size:var(--fs-h2);line-height:1.2;margin:0 0 24px}
h3{font-size:var(--fs-h3);line-height:1.35;margin:0 0 16px}
p{margin:0 0 20px}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere;font-size:.9em}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--groove);border-radius:var(--radius-xl);line-height:1.7}
pre code{overflow-wrap:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
.wrap{width:100%;max-width:var(--content);margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.section-head p{color:var(--text-muted)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid>*{min-width:0}
.stack>*+*{margin-top:24px}
.muted{color:var(--text-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;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);border:0}
.card,.panel{min-width:0;border:1px solid var(--card-edge);border-radius:var(--radius-xl);padding:32px}
.card{background:var(--card);box-shadow:var(--shadow-card),inset 0 0 0 1px var(--card)}
.panel{background:var(--panel)}
.prose{max-width:800px;min-width:0;margin-inline:auto;overflow-wrap:break-word}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose li+li{margin-top:10px}
.prose img{display:block}
.prose a{overflow-wrap:anywhere}
.prose blockquote{margin-inline:0}
.reveal{transition:opacity var(--speed-reveal) ease,transform var(--speed-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:80px;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:32px}
html.nav-open{overflow:hidden}
.stage{position:relative;overflow-x:clip;max-width:100%;background:radial-gradient(42% 58% at 90% 8%,var(--glow-warm) 0%,var(--glow-warm) 38%,var(--clear) 72%),radial-gradient(40% 52% at 7% 90%,var(--glow-cool) 0%,var(--glow-cool) 36%,var(--clear) 70%),linear-gradient(180deg,var(--bg-top) 0%,var(--bg) 55%,var(--bg-bottom) 100%)}
.topbar{position:relative;z-index:50}
.topbar__inner{max-width:1240px;margin:0 auto;padding:0 32px;height:var(--header-height);display:flex;align-items:center;gap:20px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand__mark{width:34px;height:34px;display:block;filter:drop-shadow(var(--shadow-logo))}
.brand__word{font-family:var(--font-display);font-size:20px;font-weight:var(--weight-bold);letter-spacing:-.01em;color:var(--text)}
.tabs{flex:1;display:flex;justify-content:center;min-width:0}
.tabs__list{display:flex;align-items:center;gap:0;list-style:none;margin:0;padding:0;flex-shrink:0}
.tabs-more{position:relative;flex-shrink:0}
.tabs-more__toggle{cursor:pointer;border:0;background:var(--clear);font-family:inherit;line-height:inherit}
.tabs-more__panel{position:absolute;right:0;top:100%;z-index:80;min-width:200px;max-width:calc(100vw - 32px);margin:0;padding:8px;list-style:none;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-float)}
.tabs-more__panel .tabs__link{height:auto;min-height:44px;padding:10px 16px}
.tabs-more__panel .tabs__link[aria-current="page"]::after{display:none}
.tabs__link{position:relative;display:flex;align-items:center;height:72px;padding:0 9px;font-size:15px;font-weight:var(--weight-medium);color:var(--text-muted);text-decoration:none;white-space:nowrap;transition:color var(--speed) ease}
.tabs__link:hover{color:var(--text)}
.tabs__link[aria-current="page"]{color:var(--text);font-weight:var(--weight-bold)}
.tabs__link[aria-current="page"]::after{content:"";position:absolute;left:13px;right:13px;bottom:15px;height:3px;border-radius:var(--radius-line);background:var(--accent)}
.topbar__end{display:flex;align-items:center;gap:8px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:38px;padding:0 12px;border:0;border-radius:var(--radius-pill);background:var(--clear);color:var(--text-muted);font:var(--weight-medium) 14px/1 var(--font-body);white-space:nowrap}
.lang:hover{background:var(--panel);color:var(--text)}
.lang svg{width:16px;height:16px;flex-shrink:0}
.lang__text{white-space:nowrap}
.language__panel{position:absolute;right:0;top:calc(100% + 10px);z-index:80;min-width:180px;padding:8px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-xl);box-shadow:var(--shadow-float)}
.language__panel a{display:flex;align-items:center;min-height:44px;padding:8px 16px;text-decoration:none;border-radius:var(--radius-pill)}
.language__panel a:hover,.language__panel a[aria-current="true"]{background:var(--groove)}
.login{display:inline-flex;align-items:center;justify-content:center;gap:7px;height:40px;padding:0 18px 0 14px;border-radius:var(--radius-pill);background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow-soft);color:var(--text);font-size:15px;font-weight:var(--weight-bold);text-decoration:none;white-space:nowrap;transition:border-color var(--speed) ease}
.login:hover{border-color:var(--text-muted)}
.login svg{width:16px;height:16px;flex-shrink:0}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--border);border-radius:var(--radius-pill);background:var(--panel)}
.menu-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.menu-drawer{position:fixed;top:var(--header-height);right:0;left:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));z-index:45;background:var(--panel);padding:16px var(--gutter) 32px;overflow-y:auto;overscroll-behavior:contain}
.menu-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;text-decoration:none;border-radius:var(--radius-pill)}
.menu-drawer a:hover,.menu-drawer a[aria-current="page"]{background:var(--groove);font-weight:var(--weight-bold)}
.menu-drawer__languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.menu-veil{position:fixed;inset:var(--header-height) 0 0;z-index:40;background:var(--veil);border:0}
.btn{margin-top:auto;display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 22px;border:1px solid var(--clear);border-radius:var(--radius-pill);font-size:15.5px;font-weight:var(--weight-bold);line-height:1.4;text-align:center;text-decoration:none;flex-shrink:0;white-space:nowrap;transition:background-color var(--speed) ease,filter var(--speed) ease}
.btn--soft{background:var(--groove);color:var(--text)}
.btn--soft:hover{background:var(--border)}
.btn--main,.btn-primary{background:linear-gradient(180deg,var(--accent) 0%,var(--accent) 45%,var(--accent-dark) 170%);color:var(--card);box-shadow:var(--gloss),var(--cta-glow)}
.btn--main:hover,.btn-primary:hover{filter:brightness(.95)}
.btn--outline{background:var(--clear);border-color:var(--border);color:var(--text)}
.btn--outline:hover{background:var(--panel);border-color:var(--text-muted)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--groove);color:var(--text-muted);box-shadow:none;cursor:not-allowed}
.btn__arrow{width:16px;height:16px;flex-shrink:0}
.btn__arrow path{fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.site-footer{background:var(--panel);border-top:1px solid var(--border);padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.1fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{max-width:320px;margin-top:20px;color:var(--text-muted);font-size:15px}
.footer-heading{font-size:var(--fs-body);margin:0 0 16px;font-weight:var(--weight-bold)}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 20px;list-style:none;margin:0;padding:0}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;text-decoration:none;font-size:14px;color:var(--text-muted)}
.footer-links a:hover{color:var(--text);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-languages a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;text-decoration:none}
.footer-languages a[aria-current="true"]{font-weight:var(--weight-bold)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:24px;color:var(--text-muted);font-size:13px}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px}
@media(max-width:1180px){
  .tabs__link{padding:0 9px;font-size:14.5px}
  .tabs__link[aria-current="page"]::after{left:9px;right:9px}
  .lang__text{display:none}
}
@media(max-width:980px){
  .topbar__inner{padding-inline:20px;gap:12px}
  .tabs{display:none}
  .topbar__end{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .footer-grid{gap:24px}
}
@media(min-width:981px){
  .menu-drawer,.menu-veil{display:none}
  html.nav-open{overflow:auto}
}
@media(max-width:768px){
  h1{font-size:38px}
  h2{font-size:32px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  :root{--gutter:18px;--space-section:56px;--fs-h2:30px}
  .no-break{white-space:normal}
  .wrap{padding-inline:var(--gutter)}
  .topbar__inner{padding-inline:16px;gap:8px}
  .topbar__end{margin-left:auto;gap:4px}
  .brand{gap:7px}
  .brand__mark{width:28px;height:28px}
  .brand__word{font-size:18px}
  .login{padding-inline:12px;font-size:14px}
  .login svg{display:none}
  .lang{padding-inline:8px}
  .grid,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .card,.panel{padding:24px}
  .section-head{margin-bottom:32px}
  .tilt,[data-tilt]{transform:none}
  .stage,.menu-drawer{max-width:100%}
  .footer-bottom{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}