:root{
  --bg:#FDFBF8;--bg-deep:#F8F2EA;--bg-panel:#FFFFFF;--bg-panel-2:#F6F0E7;--bg-panel-2-hi:#FAF6F0;--bg-sunken:#EFE8DD;--bg-sidebar:#F7F5F1;
  --border:#E9E2D6;--border-soft:#F0EBE2;--border-cream:#EBE1D2;
  --accent:#E9614B;--accent-light:#F07B63;--accent-dark:#C2452F;--accent-soft:#F2A08F;
  --accent-a05:rgba(233,97,75,.05);--accent-a06:rgba(233,97,75,.06);--accent-a10:rgba(233,97,75,.10);--accent-a12:rgba(233,97,75,.12);--accent-a30:rgba(233,97,75,.30);--accent-a40:rgba(233,97,75,.40);--accent-dark-a25:rgba(194,69,47,.25);
  --text:#2E2C33;--text-muted:#6E6A72;--text-faint:#9C979E;
  --ink-a04:rgba(46,44,51,.04);--ink-a06:rgba(46,44,51,.06);--ink-a12:rgba(46,44,51,.12);--ink-a22:rgba(46,44,51,.22);
  --success:#2E9D5B;--success-tint:#E5F3EA;--iris:#5B5FD6;--iris-tint:#ECECFA;--warn:#C98A12;--error:#D14343;
  --doodle:#EADBC8;--doodle-opacity:.5;--glow:rgba(246,194,166,.62);--hl-apricot:rgba(246,194,166,.45);
  --hl-white:rgba(255,255,255,.9);--hl-cta:rgba(255,255,255,.32);--glass:rgba(255,255,255,.6);--clear:transparent;
  --flag-red:#D8343A;--flag-white:#FFFFFF;--flag-blue:#3A3F7C;--flag-green:#1F8B4D;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Malgun Gothic",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Microsoft YaHei","Malgun Gothic",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-card:28px;--r-card-sm:24px;--r-win:20px;--r-status:18px;--r-tile:14px;--r-avatar:8px;--r-ic:7px;--r-flag:4px;--r-flag-sm:3px;--r-pill:999px;--r-round:50%;
  --gutter:32px;--wrap:1264px;--header-height:68px;--anchor-offset:88px;--toc-offset:152px;
  --weight-normal:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;
  --text-body:17px;--text-display:66px;--text-section:36px;--leading:1.75;
  --shadow-panel:inset 0 1px 0 var(--hl-white),0 18px 40px var(--accent-a10);
  --ease-out:cubic-bezier(.2,.7,.3,1);--duration:.2s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:var(--anchor-offset)}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--text-body);line-height:var(--leading);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,summary{-webkit-tap-highlight-color:var(--accent-a12)}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--iris);outline-offset:3px}
button:disabled,[aria-disabled="true"]{cursor:not-allowed;opacity:.55}
img{max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
ul{list-style:none;margin:0;padding:0}
p{margin:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--weight-bold);color:var(--text);margin:0;overflow-wrap:break-word;text-wrap:balance}
h1{font-size:clamp(52px,5vw,68px);line-height:1.12;letter-spacing:-.02em}
h2{font-size:var(--text-section);line-height:1.3;letter-spacing:-.02em}
h3{font-size:24px;line-height:1.4;letter-spacing:-.015em}
code,pre{font-family:var(--font-mono)}
code{overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-sunken);border-radius:var(--r-tile);font-size:14px}
pre code{overflow-wrap:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
[hidden]{display:none!important}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:72px}
.section-head{max-width:780px;margin-bottom:32px}
.section-head p{margin-top:16px;color:var(--text-muted)}
.reading-wrap{max-width:880px;margin-inline:auto;padding-inline:var(--gutter)}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose ul,.prose ol{margin-top:16px;margin-bottom:20px}
.prose ul{list-style:disc;padding-left:24px}
.prose ol{padding-left:24px}
.prose h2{margin-top:48px;margin-bottom:20px}
.prose h3{margin-top:28px;margin-bottom:14px}
.prose a:not(.btn){color:var(--iris);text-decoration:underline;text-underline-offset:4px}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.panel,.card{min-width:0;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-card);padding:28px;box-shadow:var(--shadow-panel)}
.panel--cream{background:var(--bg-panel-2)}
.grid-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid-five{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}
.grid-three>*,.grid-five>*{min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;gap:8px;height:52px;padding:0 28px;border:0;border-radius:var(--r-pill);font-size:16px;font-weight:var(--weight-semibold);line-height:1;white-space:nowrap;text-align:center;transition:transform var(--duration) ease,box-shadow var(--duration) ease,background-color var(--duration) ease}
.btn svg{width:18px;height:18px}
.btn--primary,.btn-primary{color:var(--bg-panel);background:linear-gradient(180deg,var(--accent-light) 0%,var(--accent) 52%,var(--accent-dark) 150%);box-shadow:inset 0 1px 0 var(--hl-cta),0 0 0 1px var(--accent-dark-a25),0 12px 26px -8px var(--accent-a40)}
.btn--primary:hover,.btn-primary:hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--hl-cta),0 0 0 1px var(--accent-dark-a25),0 16px 30px -8px var(--accent-a40)}
.btn--primary:active{transform:translateY(0)}
.btn--ghost{color:var(--text);border:1.5px solid var(--text);background:var(--glass)}
.btn--ghost:hover{background:var(--bg-panel)}
.btn--small{height:40px;padding-inline:20px;font-size:14px}
.btn--text{background:var(--clear);color:var(--iris);padding-inline:12px}
.topbar,#site-header{position:relative;z-index:40}
.topbar__inner{display:flex;align-items:center;gap:24px;height:var(--header-height);flex-wrap:nowrap;position:relative;z-index:43}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:var(--weight-bold);font-size:20px;letter-spacing:-.02em;color:var(--text);line-height:1;white-space:nowrap;flex-shrink:0;min-height:32px}
.brand__mark{width:32px;height:32px;display:block}
.mainnav{flex:1;display:flex;justify-content:center;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px;border-radius:var(--r-pill)}
.mainnav a{display:block;padding:7px 14px;border-radius:var(--r-pill);font-size:15px;line-height:22px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:background-color var(--duration) ease,color var(--duration) ease}
.mainnav a:hover{color:var(--text);background:var(--ink-a04)}
.nav-more{position:relative}
.nav-more-toggle{appearance:none;border:0;background:var(--clear);font:inherit;font-size:15px;line-height:22px;color:var(--text-muted);padding:7px 14px;border-radius:var(--r-pill);cursor:pointer;white-space:nowrap;min-height:38px}
.nav-more-toggle:hover{color:var(--text);background:var(--ink-a04)}
.mainnav .nav-more__panel{display:block;position:absolute;z-index:60;right:0;top:calc(100% + 8px);min-width:220px;padding:8px;border-radius:var(--r-tile);background:var(--bg-panel);border:1px solid var(--border);box-shadow:var(--shadow-panel)}
.nav-more__panel a{white-space:normal}
.mainnav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-semibold);background:var(--bg-sunken);box-shadow:inset 0 1px 0 var(--hl-white)}
.topbar__tools{display:flex;align-items:center;gap:10px;flex-shrink:0}
.language{position:relative}
.lang{appearance:none;border:0;background:var(--clear);font:inherit;font-size:14.5px;line-height:22px;color:var(--text-muted);display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:7px 10px;border-radius:var(--r-pill);cursor:pointer;white-space:nowrap;min-height:38px;width:auto}
.lang span{white-space:nowrap}
.lang:hover{color:var(--text);background:var(--ink-a04)}
.lang svg{width:16px;height:16px}
.lang__caret{font-size:11px;color:var(--text-faint)}
.lang-panel{position:absolute;z-index:60;right:0;top:calc(100% + 8px);min-width:180px;padding:8px;border-radius:var(--r-tile);background:var(--bg-panel);border:1px solid var(--border);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--r-pill);font-size:14px;white-space:nowrap}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-sunken)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 20px;border-radius:var(--r-pill);border:1.5px solid var(--text);font-size:15px;font-weight:var(--weight-semibold);line-height:1;color:var(--text);background:var(--glass);white-space:nowrap;transition:background-color var(--duration) ease}
.btn-login:hover{background:var(--bg-panel)}
.menu-toggle{display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--bg-panel);padding:10px}
.menu-toggle svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round}
.nav-drawer{position:fixed;top:var(--header-height);inset-inline:0;z-index:42;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:20px var(--gutter) 40px}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 16px;border-radius:var(--r-pill);font-size:16px}
.nav-drawer a:hover,.nav-drawer a[aria-current="page"]{background:var(--bg-sunken)}
.drawer-languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.nav-veil{position:fixed;top:var(--header-height);inset-inline:0;bottom:0;z-index:41;background:var(--ink-a22);border:0}
html.nav-open{overflow:hidden}
.site-footer{background:var(--bg-panel-2);border-top:1px solid var(--border-cream);padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.3fr 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-title{font-size:15px;margin-bottom:14px;font-weight:var(--weight-bold)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--text-muted)}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--iris)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:24px;font-size:13px;color:var(--text-muted)}
.footer-legal{display:flex;gap:20px}
.reveal{transition:opacity .35s ease,transform .35s var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:180px;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:32px}
@media(max-width:1180px){.mainnav a{padding:7px 10px;font-size:14px}.topbar__inner{gap:16px}}
@media(max-width:1050px){
  .mainnav{display:none}.menu-toggle{display:inline-flex}.topbar__tools{margin-left:auto}
}
@media(min-width:1051px){.nav-drawer,.nav-veil{display:none}}
@media(max-width:768px){
  :root{--gutter:20px;--text-section:28px}
  h1{font-size:36px;line-height:1.2}
  .section{padding-top:48px;padding-bottom:48px}
  .grid-three{grid-template-columns:minmax(0,1fr)}
  .grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .panel,.card{padding:22px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,.sticker{transform:none}
  .topbar__inner{gap:8px}
  .topbar__tools{gap:5px;margin-left:auto}
  .brand{font-size:18px;gap:7px}
  .brand__mark{width:28px;height:28px}
  .lang{font-size:12px;padding:7px 5px;gap:4px}
  .lang svg,.lang__caret{display:none}
  .btn-login{padding-inline:13px;font-size:14px}
  .menu-toggle{padding:10px}
}
@media(max-width:359px){
  :root{--gutter:16px}
  .brand{font-size:16px;gap:5px}.brand__mark{width:24px;height:24px}
  .topbar__tools{gap:3px}.btn-login{padding-inline:10px}.lang{font-size:11px;padding-inline:3px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
  .btn,.mainnav a,.btn-login{transition:none}
}