:root{
  --bg:#F7EEE4;
  --bg-panel:#FFFBF6;
  --bg-panel2:#EFE4D6;
  --bg-sunk:#E5D6C4;
  --border:#E2D4C4;
  --border-strong:#D5C2AE;
  --border-soft:rgba(214,194,174,.55);
  --accent:#C73E5C;
  --accent-dark:#9B2C45;
  --apricot:#E8A08C;
  --text:#2B1E1A;
  --text-muted:#7A6A60;
  --text-soft:#9C8B80;
  --success:#2F8A5B;
  --warn:#C98A1C;
  --error:#B3261E;
  --hero-top:#FBF6EF;
  --hero-bottom:#F2E7DA;
  --hi:#FFFFFF;
  --hi-soft:rgba(255,255,255,.78);
  --hi-cta:rgba(255,255,255,.26);
  --hi-dim:rgba(255,251,246,.16);
  --wash:rgba(255,251,246,.66);
  --panel-glass:rgba(255,251,246,.64);
  --rose-08:rgba(199,62,92,.08);
  --rose-10:rgba(199,62,92,.10);
  --rose-14:rgba(199,62,92,.14);
  --rose-22:rgba(199,62,92,.22);
  --rose-36:rgba(199,62,92,.36);
  --brown-08:rgba(43,30,26,.08);
  --brown-12:rgba(43,30,26,.12);
  --veil:rgba(43,30,26,.3);
  --flag-red:#C8283C;
  --flag-white:#FFFBF6;
  --flag-blue:#26386F;
  --flag-navy:#1F2C5C;
  --flag-green:#2F8A5B;
  --flag-edge:rgba(43,30,26,.16);
  --font-display:'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --font-serif:Georgia,'Noto Serif SC','Songti SC','STSong',serif;
  --weight-normal:400;
  --weight-medium:500;
  --weight-strong:600;
  --r-dot:2px;
  --r-xs:6px;
  --r-seg:7px;
  --r-sm:10px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:20px;
  --r-pill:999px;
  --shadow-station:inset 0 1px 0 var(--hi),0 40px 88px -24px var(--rose-14),0 8px 22px -12px var(--rose-10);
  --shadow-card:inset 0 1px 0 var(--hi-soft),0 12px 24px -14px var(--rose-22),0 1px 2px var(--brown-08);
  --shadow-card-lift:inset 0 1px 0 var(--hi),0 18px 32px -16px var(--rose-36),0 1px 2px var(--brown-08);
  --shadow-float:0 18px 40px -16px var(--rose-22),0 2px 6px var(--brown-08);
  --shadow-chip:inset 0 1px 0 var(--hi),0 1px 2px var(--brown-08);
  --shadow-cta:inset 0 1px 0 var(--hi-cta),0 12px 24px -12px var(--rose-36);
  --petal-opacity:.06;
  --glow-opacity:.16;
  --grain-opacity:.03;
  --grain:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='180' height='180'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.17 0 0 0 0 0.12 0 0 0 0 0.10 0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  --gutter:32px;
  --wrap:1200px;
  --reading:800px;
  --header-height:64px;
  --anchor-offset:80px;
  --toc-offset:132px;
  --ease:ease;
  --fast:.2s;
  --reveal-time:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::before{content:"";position:fixed;inset:0;background-image:var(--grain);background-size:180px 180px;opacity:var(--grain-opacity);mix-blend-mode:multiply;pointer-events:none;z-index:40}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,a,input,select,textarea,summary{touch-action:manipulation}
button{border:0}
[hidden]{display:none!important}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
img{max-width:100%;height:auto}
svg{vertical-align:middle}
h1,h2,h3{text-wrap:balance;overflow-wrap:break-word}
h1{font-family:var(--font-display);font-size:clamp(52px,4.45vw,64px);font-weight:var(--weight-medium);line-height:1.1;letter-spacing:-.02em}
h2{font-family:var(--font-serif);font-weight:var(--weight-normal);font-size:clamp(30px,3.1vw,44px);line-height:1.22;letter-spacing:-.015em}
h3{font-family:var(--font-serif);font-size:26px;line-height:1.3;font-weight:var(--weight-normal)}
p{margin:0 0 1.25em}
strong{font-weight:var(--weight-strong)}
code{font-family:var(--font-mono);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{overflow-wrap:normal;white-space:pre}
blockquote{margin-inline:0}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:80px;padding-bottom:80px}
.grid{display:grid;gap:24px}
.grid>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.stack{display:grid;gap:20px;min-width:0}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.kw,.hl{color:var(--accent)}
.center{text-align:center}
.panel{background:var(--bg-panel2);border:1px solid var(--border);border-radius:var(--r-xl);padding:32px;box-shadow:var(--shadow-station)}
.card{background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;box-shadow:var(--shadow-card);min-width:0}
.ico{width:16px;height:16px;flex-shrink:0;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.dot{width:10px;height:10px;flex-shrink:0;border-radius:var(--r-dot);background:var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 26px;border:1px solid transparent;border-radius:var(--r-xs);font-size:16px;font-weight:var(--weight-medium);font-family:var(--font-body);line-height:26px;flex-shrink:0;white-space:nowrap;transition:transform var(--fast) var(--ease),background-color var(--fast) var(--ease),box-shadow var(--fast) var(--ease)}
.btn-primary{background:var(--accent);color:var(--bg-panel);box-shadow:var(--shadow-cta)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-ghost,.btn-secondary{border-color:var(--text);color:var(--text);background:transparent}
.btn-ghost:hover,.btn-secondary:hover{background:var(--bg-panel)}
.btn:active,.btn.is-active{transform:translateY(1px);box-shadow:var(--shadow-chip)}
.btn:disabled,.btn[aria-disabled="true"]{background:var(--bg-sunk);color:var(--text-muted);border-color:var(--border-strong);box-shadow:none;cursor:not-allowed;transform:none}
.btn.is-focus{outline:2px solid var(--accent-dark);outline-offset:3px}
.text-link{display:inline-flex;align-items:center;min-height:24px;gap:6px;text-decoration:underline;text-underline-offset:4px}
.site-header,#site-header{position:sticky;top:0;z-index:50;font-size:16px;line-height:1.5;background:var(--bg-panel);border-bottom:1px solid var(--border-soft)}
.bar{position:relative;z-index:30;max-width:1376px;margin:0 auto;padding:0 32px;height:var(--header-height);display:flex;align-items:center;gap:28px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;font-family:var(--font-display);font-weight:var(--weight-strong);font-size:19px;letter-spacing:-.02em;color:var(--text);min-height:28px}
.brand img{width:28px;height:28px;display:block;flex-shrink:0}
.brand-zh{font-weight:var(--weight-normal);color:var(--text-muted)}
.nav{flex:1;min-width:0}
.nav-more{position:relative}
.nav-more-toggle{padding:7px 10px;font-size:14px;line-height:20px;color:var(--text-muted);background:transparent;white-space:nowrap;cursor:pointer}
.nav-more-panel{position:absolute;top:calc(100% + 8px);right:0;z-index:60;min-width:240px;padding:6px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);box-shadow:var(--shadow-float)}
.nav-more-panel a{display:flex;min-height:44px;width:100%}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav li{flex-shrink:0}
.nav a{display:inline-flex;align-items:center;gap:6px;padding:7px 10px;border-radius:var(--r-xs);font-size:14px;line-height:20px;color:var(--text-muted);white-space:nowrap;transition:color var(--fast) var(--ease),background-color var(--fast) var(--ease)}
.nav a:hover{color:var(--text);background:var(--wash)}
.nav a[aria-current="page"]{color:var(--text);background:var(--bg-panel);box-shadow:var(--shadow-chip)}
.bar-end{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
.language{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;width:auto;min-width:44px;padding:0 12px;border:1px solid var(--border);border-radius:var(--r-xs);background:var(--panel-glass);color:var(--text-muted);font-size:14px;white-space:nowrap}
.lang-name{white-space:nowrap}
.caret{font-size:11px;color:var(--text-soft)}
.lang-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:60;min-width:172px;padding:6px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);box-shadow:var(--shadow-float)}
.lang-panel a{display:flex;align-items:center;width:100%;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);font-size:14px}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--bg-panel2)}
.login{display:inline-flex;align-items:center;justify-content:center;height:36px;min-width:60px;padding:0 18px;border-radius:var(--r-xs);background:var(--text);color:var(--bg-panel);font-size:14px;font-weight:var(--weight-medium);box-shadow:inset 0 1px 0 var(--hi-dim);white-space:nowrap;transition:background-color var(--fast) var(--ease)}
.login:hover{background:var(--accent-dark)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--r-xs)}
.menu-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}
.mobile-drawer{position:fixed;inset:var(--header-height) 0 auto;z-index:60;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--bg-panel);padding:16px var(--gutter) 32px}
.mobile-drawer a{display:flex;align-items:center;width:100%;gap:12px;min-height:44px;padding:12px;border-radius:var(--r-xs)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--bg-panel2)}
.drawer-languages{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));border-top:1px solid var(--border);margin-top:12px;padding-top:12px}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;z-index:28;background:var(--veil)}
.site-footer{border-top:1px solid var(--border);background:var(--bg-panel2);padding-top:56px;padding-bottom:24px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.footer-grid>*{min-width:0}
.footer-brand p{margin-top:18px;max-width:330px;color:var(--text-muted);font-size:14px}
.footer-heading{font-family:var(--font-body);font-size:14px;font-weight:var(--weight-strong);margin:0 0 12px}
.footer-links{list-style:none;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px;margin:0;padding:0}
.footer-links a,.footer-languages a,.legal-links 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,.legal-links a:hover{color:var(--text);text-decoration:underline;text-underline-offset:3px}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;padding-top:32px}
.footer-bottom{margin-top:24px;padding-top:20px;border-top:1px solid var(--border-strong);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-size:13px;color:var(--text-muted)}
.legal-links{display:flex;flex-wrap:wrap;gap:16px}
.prose{min-width:0;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose h2{margin-top:56px;font-size:32px}
.prose h3{margin-top:32px}
.prose a{text-decoration:underline;text-underline-offset:4px}
.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:static;display:block;min-height:120px;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status>*{max-width:100%;min-width:0}
#server-status+*{margin-top:24px}
@media(max-width:1240px) and (min-width:769px){
  .bar{height:auto;min-height:64px;flex-wrap:wrap;padding:12px 24px;gap:10px 20px}
  .nav{order:3;flex-basis:100%;scrollbar-width:none}
}
@media(max-width:768px){
  :root{--gutter:20px}
  h1{font-size:38px;line-height:1.18}
  .sec{padding-top:56px;padding-bottom:56px}
  .bar{height:var(--header-height);padding:0 var(--gutter);gap:10px}
  .nav{display:none}
  .bar-end{margin-left:auto;gap:6px}
  .menu-toggle{display:inline-flex}
  .brand{gap:6px;font-size:17px}
  .brand img{width:24px;height:24px}
  .lang{padding:0 8px;font-size:12px}
  .login{padding:0 12px}
  .grid-three,.grid-two{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .panel{padding:24px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .decor,.atmos,.station-glow{max-width:100%}
}
@media(max-width:380px){
  :root{--gutter:16px}
  .bar{gap:6px}
  .brand{font-size:15px;gap:4px}
  .brand img{width:22px;height:22px}
  .login{min-width:48px;padding:0 9px;font-size:12px}
  .lang{padding:0 6px;gap:4px}
  .lang .ico,.lang .caret{display:none}
  .bar-end{gap:4px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}