:root{
  color-scheme:light;
  --bg:#F8F7F6;
  --bg-panel:#FFFFFF;
  --bg-panel2:#F1EFEE;
  --border:#E4E0DF;
  --border-strong:#D5CFCE;
  --accent:#3B2430;
  --accent-2:#6E4058;
  --accent-dark:#24151D;
  --text:#1D171A;
  --text-muted:#6E6569;
  --text-faint:#9C9397;
  --on-accent:#FFFFFF;
  --success:#1FA563;
  --warn:#E89A1C;
  --error:#D6453D;
  --idle:#BDB5B8;
  --rose:#B4899A;
  --badge-plum:#7D6874;
  --flag-red:#D33A3A;
  --flag-blue:#2D3A78;
  --flag-green:#1E8A4F;
  --flag-white:#FFFFFF;
  --clear:transparent;
  --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,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:6px;
  --r-sm:8px;
  --r-md:10px;
  --r-lg:12px;
  --r-pill:999px;
  --r-circle:50%;
  --r-key:5px;
  --r-item:7px;
  --shell:1200px;
  --gutter:40px;
  --head-height:64px;
  --menu-top:104px;
  --anchor-gap:88px;
  --toc-offset:12px;
  --toc-landing:88px;
  --text-xs:12px;
  --text-sm:14px;
  --text-base:15px;
  --text-lead:20px;
  --title-xl:68px;
  --title-lg:36px;
  --title-md:24px;
  --title-sm:18px;
  --weight-normal:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --weight-display:800;
  --ease:ease;
  --time-fast:.2s;
  --time-reveal:.35s;
  --hi-edge:inset 0 1px 0 var(--bg-panel);
  --shadow-hair:0 1px 2px color-mix(in srgb,var(--accent) 6%,transparent);
  --shadow-chip:0 1px 2px color-mix(in srgb,var(--accent) 6%,transparent),0 14px 32px -10px color-mix(in srgb,var(--accent) 14%,transparent);
  --shadow-window:0 1px 1px color-mix(in srgb,var(--accent) 5%,transparent),0 12px 24px -12px color-mix(in srgb,var(--accent) 8%,transparent),0 32px 48px -14px color-mix(in srgb,var(--accent) 10%,transparent);
  --shadow-cta:inset 0 1px 0 color-mix(in srgb,var(--on-accent) 18%,transparent),0 1px 2px color-mix(in srgb,var(--accent) 20%,transparent),0 10px 22px -8px color-mix(in srgb,var(--accent) 38%,transparent);
  --fill-primary:linear-gradient(180deg,var(--accent-2),var(--accent));
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--text-base);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
[hidden]{display:none!important}
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}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance}
h1{font-size:clamp(52px,5vw,68px);line-height:1.12;font-weight:var(--weight-display);letter-spacing:-.02em}
h2{font-size:var(--title-lg);line-height:1.25;letter-spacing:-.02em}
h3{font-size:var(--title-md);line-height:1.35}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-xs)}
::selection{background:var(--accent);color:var(--on-accent)}
.shell,.wrap{width:100%;max-width:calc(var(--shell) + var(--gutter)*2);padding-inline:var(--gutter);margin-inline:auto}
.section{padding-top:72px;padding-bottom:72px}
.section-head{margin-bottom:32px}
.section-head h2{margin:0 0 12px}
.section-head p{max-width:52em;color:var(--text-muted)}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.ico{width:16px;height:16px;flex:none;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.ico-sm{width:14px;height:14px}
.glyph{width:16px;height:16px;flex:none;fill:currentColor}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden;pointer-events:none}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.grid>*{min-width:0}
.panel,.card{min-width:0;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:var(--hi-edge),var(--shadow-hair)}
.panel{padding:28px}
.card{padding:24px}
.badge,.tag,.fact-pill{display:inline-flex;align-items:center;gap:7px;min-height:26px;padding:3px 10px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-pill);font-size:var(--text-xs);font-weight:var(--weight-medium);max-width:100%;overflow:hidden;overflow-wrap:anywhere}
.fact-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}
.status-dot,.dot{width:8px;height:8px;flex:none;border-radius:var(--r-circle)}
.dot-ok{background:var(--success);box-shadow:0 0 0 3px color-mix(in srgb,var(--success) 18%,transparent)}
.dot-warn{background:var(--warn);box-shadow:0 0 0 3px color-mix(in srgb,var(--warn) 18%,transparent)}
.dot-idle{background:var(--idle);box-shadow:0 0 0 3px color-mix(in srgb,var(--idle) 22%,transparent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 26px;border-radius:var(--r-pill);font-size:15.5px;font-weight:var(--weight-semibold);letter-spacing:.01em;line-height:24px;flex-shrink:0;white-space:nowrap;max-width:100%;transition:transform var(--time-fast) var(--ease),box-shadow var(--time-fast) var(--ease),border-color var(--time-fast) var(--ease)}
.btn-ghost,.btn-secondary{background:var(--bg-panel);color:var(--text);border:1px solid var(--border-strong);box-shadow:var(--hi-edge),var(--shadow-hair)}
.btn-ghost:hover,.btn-secondary:hover{border-color:color-mix(in srgb,var(--accent) 40%,var(--border-strong))}
.btn-solid,.btn-primary{background:var(--fill-primary);color:var(--on-accent);border:1px solid var(--accent-dark);box-shadow:var(--shadow-cta)}
.btn-solid:hover,.btn-primary:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-panel2);color:var(--text-muted);border:1px solid var(--border);box-shadow:none;transform:none;pointer-events:none}
.btn-small{min-height:36px;padding:5px 16px;font-size:var(--text-sm)}
.cta-row{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:28px}
.prose{min-width:0;max-width:76ch;line-height:1.9}
.prose p,.prose ul,.prose ol,.prose pre,.prose blockquote{margin-block:20px}
.prose ul{list-style:disc;padding-left:1.5em}
.prose ol{padding-left:1.5em}
.prose h2{margin:48px 0 20px}
.prose h3{margin:32px 0 16px}
.prose a{text-decoration:underline;text-underline-offset:4px;color:var(--accent)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--bg-panel2);border:1px solid var(--border);border-radius:var(--r-sm)}
pre code{white-space:pre;overflow-wrap:normal}
.reveal{transition:opacity var(--time-reveal) var(--ease),transform var(--time-reveal) var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:static;display:block;min-width:0;max-width:100%;min-height:48px;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:24px}
.top{position:relative;overflow-x:clip;max-width:100%;background:radial-gradient(640px 460px at 82% 47%,color-mix(in srgb,var(--rose) 8%,transparent) 0%,transparent 72%),linear-gradient(180deg,color-mix(in srgb,var(--accent) 6%,var(--bg)) 0%,color-mix(in srgb,var(--accent) 3%,var(--bg)) 36%,var(--bg) 76%)}
.announce-toggle{position:absolute;width:1px;height:1px;opacity:0;pointer-events:none}
.announce{position:relative;display:flex;align-items:center;justify-content:center;min-height:40px;padding:0 64px;background:var(--accent);color:var(--on-accent);font-size:var(--text-sm);font-weight:var(--weight-medium);letter-spacing:.01em}
.announce-link{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:28px}
.announce-sep{opacity:.55;margin:0 2px}
.announce-x{position:absolute;right:20px;top:50%;width:28px;height:28px;margin-top:-14px;display:grid;place-items:center;padding:0;border:0;background:var(--clear);border-radius:var(--r-pill);cursor:pointer;color:var(--on-accent)}
.announce-x:hover{background:color-mix(in srgb,var(--on-accent) 12%,transparent)}
.announce-toggle:focus-visible+.announce .announce-x{outline:2px solid var(--on-accent)}
.announce-toggle:checked+.announce{display:none}
#site-header{position:relative;z-index:60}
.site-head{border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--bg) 55%,transparent)}
.head-in{display:flex;align-items:center;gap:32px;min-height:var(--head-height);flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:10px;flex:none;min-height:32px}
.brand-mark{width:30px;height:30px;flex:none}
.brand-en{font-family:var(--font-display);font-weight:var(--weight-display);font-size:var(--title-sm);letter-spacing:-.02em;color:var(--text)}
.brand-zh{font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-muted)}
.mainnav{flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav li{min-width:0}
.mainnav a{display:flex;align-items:center;gap:6px;min-height:36px;padding:6px 10px;border-radius:var(--r-sm);font-size:var(--text-sm);font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:color var(--time-fast),background var(--time-fast)}
.mainnav a:hover{color:var(--text);background:var(--bg-panel2)}
.mainnav a[aria-current="page"]{color:var(--text);background:var(--bg-panel);box-shadow:inset 0 0 0 1px var(--border),var(--shadow-hair)}
.mainnav a[aria-current="page"] .ico{color:var(--accent)}
.head-act{display:flex;align-items:center;gap:8px;margin-left:auto;flex-shrink:0}
.lang-wrap{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:4px;min-width:44px;width:auto;min-height:36px;padding:0 10px;border:0;background:var(--clear);border-radius:var(--r-sm);font-size:var(--text-sm);color:var(--text-muted);font-weight:var(--weight-medium)}
.lang span{white-space:nowrap}
.lang .ico{width:14px;height:14px}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:90;min-width:180px;padding:6px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-md);box-shadow:var(--shadow-chip)}
.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="true"]{background:var(--bg-panel2);color:var(--accent)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-height:38px;padding:6px 18px 6px 14px;border-radius:var(--r-pill);background:var(--bg-panel);border:1px solid var(--border-strong);font-size:var(--text-sm);font-weight:var(--weight-semibold);color:var(--text);box-shadow:var(--hi-edge),var(--shadow-hair);white-space:nowrap}
.btn-login:hover{border-color:var(--accent);box-shadow:var(--shadow-chip)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:10px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-sm)}
.menu-toggle .ico{width:20px;height:20px}
.menu-veil{display:none;position:fixed;inset:var(--menu-top) 0 0;z-index:62;border:0;background:color-mix(in srgb,var(--accent-dark) 20%,transparent)}
.mobile-drawer{display:none;position:fixed;top:var(--menu-top);right:0;width:min(400px,100%);height:calc(100dvh - var(--menu-top));max-height:calc(100dvh - var(--menu-top));overflow-y:auto;overscroll-behavior:contain;z-index:64;padding:16px;background:var(--bg-panel);border-left:1px solid var(--border);box-shadow:var(--shadow-window)}
.mobile-drawer ul{display:grid;gap:4px}
.mobile-drawer a{display:flex;align-items:center;gap:10px;width:100%;min-height:44px;padding:10px 14px;border-radius:var(--r-sm);font-weight:var(--weight-medium)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"],.mobile-drawer a[aria-current="true"]{background:var(--bg-panel2);color:var(--accent)}
.drawer-languages{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
.announcement-closed{--menu-top:64px}
.site-foot{margin-top:64px;padding-top:56px;padding-bottom:24px;border-top:1px solid var(--border);background:var(--bg-panel2)}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:48px}
.foot-grid>*{min-width:0}
.foot-brand p{max-width:30em;margin-top:16px;color:var(--text-muted);font-size:var(--text-sm)}
.foot-title{margin:0 0 16px;font-size:var(--text-sm);font-weight:var(--weight-semibold)}
.foot-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px}
.foot-links a,.foot-languages a,.foot-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--text-sm);color:var(--text-muted)}
.foot-links a:hover,.foot-languages a:hover,.foot-legal a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px}
.foot-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px}
.foot-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:24px;padding-top:20px;border-top:1px solid var(--border);font-size:var(--text-xs);color:var(--text-muted)}
.foot-legal{display:flex;flex-wrap:wrap;gap:16px}
@media(max-width:1180px){
  .head-in{gap:16px}
  .mainnav a{padding-inline:7px;font-size:13px}
}
@media(max-width:1100px){
  .mainnav{display:none}
  .head-act{margin-left:auto}
  .menu-toggle{display:inline-flex}
  html.nav-open .mobile-drawer,html.nav-open .menu-veil{display:block}
  .head-in{position:relative;z-index:66;background:var(--bg)}
}
@media(max-width:768px){
  :root{--gutter:20px}
  h1{font-size:36px}
  h2{font-size:28px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding-top:48px;padding-bottom:48px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .foot-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .no-break{white-space:normal}
  .tilt,.float{transform:none}
  .top,.decorated{max-width:100%;overflow-x:clip}
  .announce{padding:6px 44px 6px 12px;font-size:12px;min-height:40px}
  .announce-link{gap:4px}
  .announce-x{right:8px}
  .head-in{gap:8px}
  .brand{gap:7px}
  .brand-en{font-size:16px}
  .brand-mark{width:26px;height:26px}
  .head-act{gap:4px;margin-left:auto}
  .lang{padding:0 6px}
  .lang span{display:none}
  .btn-login{padding:6px 12px;min-height:38px}
  .btn-login .ico{display:none}
  .btn{min-height:44px;padding:9px 22px;font-size:var(--text-base)}
  .grid,.foot-grid{grid-template-columns:minmax(0,1fr)}
  .foot-brand{grid-column:auto}
  .panel,.card{padding:20px}
  .foot-links{gap:8px 16px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}