:root {
  --bg:#FAF5EC;
  --bg-top:#FCF8F1;
  --bg-bottom:#F4ECDF;
  --panel:#FFFDF9;
  --panel-2:#F3ECDF;
  --panel-3:#F8F2E8;
  --border:#E6DCCB;
  --border-veil:rgba(230,220,203,.72);
  --border-strong:#D6C8B2;
  --accent:#4F2EDB;
  --accent-dark:#3A1FAE;
  --accent-soft:#EEEAFB;
  --accent-line:rgba(79,46,219,.36);
  --accent-wash:rgba(79,46,219,.08);
  --accent-wash-2:rgba(79,46,219,.04);
  --text:#241C14;
  --text-muted:#6E6152;
  --text-faint:#9C8E7B;
  --success:#2F8F5B;
  --success-soft:rgba(47,143,91,.12);
  --warn:#C98A14;
  --error:#C2413A;
  --amber:#FF8A2B;
  --rose:#F45DB0;
  --amber-wash:rgba(255,138,43,.10);
  --rose-wash:rgba(244,93,176,.08);
  --glow-amber:rgba(255,138,43,.08);
  --glow-rose:rgba(244,93,176,.06);
  --glow-violet:rgba(79,46,219,.05);
  --white:#FFFFFF;
  --mask:#FFFFFF;
  --hi-soft:rgba(255,255,255,.18);
  --flag-dark:#7D6F5F;
  --flag-mid:#AC9D88;
  --flag-light:#F7F1E6;
  --veil:rgba(36,28,20,.28);
  --clear:transparent;
  --shadow-float:0 40px 80px -32px rgba(58,31,174,.12),0 18px 40px -20px rgba(79,46,219,.11);
  --shadow-soft:0 12px 28px -14px rgba(79,46,219,.12),0 2px 6px rgba(58,31,174,.04);
  --shadow-hover:0 22px 46px -20px rgba(79,46,219,.14);
  --shadow-btn:0 12px 24px -14px rgba(79,46,219,.30);
  --shadow-knob:0 1px 3px rgba(36,28,20,.18);
  --ring-hi:inset 0 0 0 1px rgba(255,255,255,.9);
  --r-xs:4px;
  --r-s:6px;
  --r-m:8px;
  --r-phone:30px;
  --r-screen:22px;
  --r-pill:999px;
  --r-round:50%;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,4.6vw,66px);
  --size-h2:clamp(28px,3vw,40px);
  --size-h3:22px;
  --weight-body:400;
  --weight-display:500;
  --weight-strong:600;
  --wrap:1200px;
  --gutter:32px;
  --bar-h:72px;
  --anchor-gap:88px;
  --toc-offset:88px;
  --section-space:80px;
  --ease:ease;
  --fast:.2s;
  --reveal-time:.35s;
}
*,*::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);font-weight:var(--weight-body);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
img,video{max-width:100%;height:auto}
svg{vertical-align:middle}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
a{color:inherit;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--weight-display);overflow-wrap:break-word}
h1{font-size:var(--size-h1);line-height:1.1;letter-spacing:-.02em}
h2{font-size:var(--size-h2);line-height:1.25;letter-spacing:-.015em;text-wrap:balance}
h3{font-size:var(--size-h3);line-height:1.4}
p{margin:0 0 1.2em}
strong,b{font-weight:var(--weight-strong)}
code,kbd,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--border);border-radius:var(--r-s);background:var(--panel-2)}
pre code{overflow-wrap:normal}
hr{border:0;border-top:1px solid var(--border);margin-block:32px}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.reading-wrap{max-width:850px}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.flex-row{display:flex;align-items:center;flex-wrap:wrap;gap:12px}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.accent-text{color:var(--accent)}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.section-head{margin-bottom:32px;max-width:760px}
.section-head h2{margin-top:0;margin-bottom:16px}
.section-head p{color:var(--text-muted)}
.panel,.card{position:relative;min-width:0;padding:28px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-m);box-shadow:var(--ring-hi),var(--shadow-soft)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:50px;padding:10px 22px;border:1px solid var(--clear);border-radius:var(--r-s);font-family:var(--font-body);font-size:15.5px;font-weight:var(--weight-strong);line-height:1.4;text-decoration:none;transition:background-color var(--fast) var(--ease),border-color var(--fast) var(--ease);white-space:nowrap}
.btn svg{width:16px;height:16px;flex-shrink:0;transition:transform var(--fast) var(--ease)}
.btn-primary{background:var(--accent);color:var(--white);box-shadow:inset 0 1px 0 var(--hi-soft),var(--shadow-btn)}
.btn-primary svg{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark)}
.btn-primary:hover svg{transform:translateX(2px)}
.btn-ghost,.btn-secondary{background:var(--panel);color:var(--accent);border-color:var(--accent-line)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--accent-soft);border-color:var(--accent)}
.btn-ghost svg{fill:currentColor}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;box-shadow:none}
.btn-small{min-height:40px;padding:8px 16px;font-size:var(--size-small)}
.btn.is-focus{outline:2px solid var(--accent);outline-offset:3px}
.topbar{position:relative;z-index:50;border-bottom:1px solid var(--border-veil)}
.topbar-in{height:var(--bar-h);display:flex;align-items:center;gap:28px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);flex-shrink:0;min-height:36px}
.brand img{width:26px;height:26px;flex-shrink:0}
.brand-word{font-family:var(--font-display);font-weight:var(--weight-strong);font-size:19px;letter-spacing:-.01em;white-space:nowrap}
.nav{flex:1;min-width:0}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav li{min-width:0}
.nav a{display:inline-flex;align-items:center;gap:6px;min-height:36px;padding:6px 11px;border-radius:var(--r-s);font-size:14.5px;color:var(--text-muted);text-decoration:none;white-space:nowrap}
.nav a svg,.drawer svg{width:16px;height:16px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.nav a:hover{color:var(--text);background:var(--panel-3)}
.nav a[aria-current="page"],.drawer a[aria-current="page"]{color:var(--accent);background:var(--accent-soft)}
.top-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
.lang-wrap{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 12px;border:1px solid var(--border);border-radius:var(--r-s);background:var(--panel);color:var(--text);font-size:var(--size-small)}
.lang svg{width:15px;height:15px;flex-shrink:0;fill:none;stroke:var(--text-muted);stroke-width:1.5;stroke-linecap:round}
.lang-text{white-space:nowrap}
.lang-caret{color:var(--text-muted);font-size:11px}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:80;min-width:170px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-m);box-shadow:var(--shadow-float)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-xs);white-space:nowrap}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--accent-soft);color:var(--accent)}
.login{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;padding:0 18px;border:1px solid var(--accent-line);border-radius:var(--r-s);background:var(--panel);color:var(--accent);font-size:14.5px;font-weight:var(--weight-strong);text-decoration:none;white-space:nowrap;box-shadow:var(--shadow-soft)}
.login:hover{background:var(--accent-soft);border-color:var(--accent)}
.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(--r-s);background:var(--panel);color:var(--text)}
.menu-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.drawer{display:none}
.nav-veil{position:fixed;inset:var(--bar-h) 0 0;z-index:30;border:0;background:var(--veil)}
.site-footer{border-top:1px solid var(--border);background:linear-gradient(180deg,var(--panel),var(--panel-2));padding-top:56px;padding-bottom:28px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{margin-top:18px;max-width:28em;color:var(--text-muted);font-size:var(--size-small)}
.footer-title{font-size:var(--size-small);font-weight:var(--weight-strong);margin:0 0 14px}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:var(--size-small);color:var(--text-muted);text-decoration:none}
.footer-links a:hover{color:var(--accent);text-decoration:underline}
.footer-langs{display:flex;flex-wrap:wrap;gap:10px 20px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-langs a,.footer-bottom a{display:inline-flex;align-items:center;min-height:30px;font-size:var(--size-small);color:var(--text-muted)}
.footer-bottom{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;color:var(--text-muted);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.reveal{transition:opacity var(--reveal-time) var(--ease),transform var(--reveal-time) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:120px;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
#server-status>*{min-width:0;max-width:100%}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:48px}
.prose h3{margin-top:28px}
.prose img{border-radius:var(--r-s)}
.prose a:not(.btn){color:var(--accent)}
.decorated,.stage{position:relative;isolation:isolate;overflow-x:clip;max-width:100%}
@media(min-width:1081px) and (max-width:1279px){
  .topbar-in{gap:14px}
  .nav a{padding-inline:7px;font-size:13px;gap:4px}
  .top-actions{gap:6px}
  .lang{padding-inline:8px}
}
@media(max-width:1080px){
  .nav{display:none}
  .top-actions{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .drawer{position:fixed;top:var(--bar-h);left:0;right:0;height:calc(100dvh - var(--bar-h));max-height:calc(100dvh - var(--bar-h));z-index:40;overflow-y:auto;overscroll-behavior:contain;padding:16px var(--gutter) 32px;background:var(--panel);border-top:1px solid var(--border)}
  .drawer:not([hidden]){display:block}
  .drawer ul{list-style:none;margin:0;padding:0}
  .drawer a{display:flex;align-items:center;width:100%;gap:12px;min-height:46px;padding:12px;border-radius:var(--r-s);text-decoration:none}
  .drawer a:hover{background:var(--panel-2)}
  .drawer-langs{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
}
@media(max-width:768px){
  :root{--gutter:16px;--size-h1:clamp(28px,8.6vw,40px);--section-space:48px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .footer-brand{grid-column:1/-1}
  .panel,.card{padding:22px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none!important}
  .decorated,.stage{max-width:100%}
  .topbar-in{gap:8px}
  .brand{gap:6px}
  .brand-word{font-size:17px}
  .brand img{width:24px;height:24px}
  .top-actions{gap:6px;margin-left:auto}
  .login{padding-inline:12px;font-size:13px}
  .lang{padding-inline:8px}
  .lang-text{display:none}
  .footer-grid{gap:24px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}