:root {
  --bg:#F5EEE3;
  --bg-panel:#FFFBF4;
  --bg-panel-2:#EDE4D5;
  --border:#E0D5C3;
  --accent:#5B34C7;
  --accent-dark:#3F1F96;
  --accent-2:#8E6CF0;
  --text:#2A2119;
  --text-muted:#6E6153;
  --success:#2F7D4F;
  --warn:#B7791F;
  --error:#B83A2E;
  --paper-top:#FAF5EC;
  --paper-end:#EFE6D7;
  --paper-end-0:rgba(239,230,215,0);
  --paper-end-60:rgba(239,230,215,.62);
  --tabbar:#F5EDE1;
  --row-current:#E3D7C3;
  --border-strong:#D2C3AB;
  --rule-soft:rgba(224,213,195,.75);
  --edge-line:#D6C8B1;
  --accent-04:rgba(91,52,199,.04);
  --accent-10:rgba(91,52,199,.10);
  --accent-14:rgba(91,52,199,.14);
  --accent-24:rgba(91,52,199,.24);
  --accent-tint:#ECE5FA;
  --accent-tint-0:rgba(236,229,250,0);
  --accent-tint-2:#D9CDF5;
  --hi-edge:rgba(255,255,255,.82);
  --hi-edge-btn:rgba(255,255,255,.22);
  --hi-edge-dim:rgba(255,255,255,.10);
  --shade-1:rgba(42,33,25,.05);
  --shade-2:rgba(42,33,25,.14);
  --shade-3:rgba(42,33,25,.26);
  --xt-1:#FFFBF4;
  --xt-2:#EEE8FB;
  --xt-3:#D7CBF6;
  --xt-4:#B9A5F0;
  --xt-5:#8E6CF0;
  --xt-6:#6A45D6;
  --flag-red:var(--error);
  --flag-blue:#2C3B74;
  --flag-white:#FFFBF4;
  --flag-edge:rgba(42,33,25,.16);
  --transparent:transparent;
  --radius-xs:4px;
  --radius-s:6px;
  --radius:8px;
  --radius-l:10px;
  --radius-xl:18px;
  --radius-phone:28px;
  --radius-screen:21px;
  --radius-pill:999px;
  --radius-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,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --grain:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  --grain-alpha:.03;
  --wrap:1264px;
  --gutter:32px;
  --header-height:64px;
  --anchor-offset:80px;
  --toc-offset:136px;
  --ease:ease;
  --fast:160ms;
  --reveal-time:600ms;
  --panel-shadow:inset 0 1px 0 var(--hi-edge),0 24px 64px -32px var(--accent-10);
}
*,*::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:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{max-width:100%;height:auto;display:block}
svg{flex-shrink:0}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance}
h1{margin:0 0 28px;font-size:clamp(52px,4.5vw,64px);font-weight:800;line-height:1.1;letter-spacing:-.02em}
h2{margin:0 0 16px;font-size:clamp(30px,3.4vw,48px);font-weight:800;line-height:1.2;letter-spacing:-.02em}
h3{margin:0 0 10px;font-size:22px;line-height:1.3;font-weight:700;letter-spacing:-.015em}
p{margin:0 0 20px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--radius-xs)}
[hidden]{display:none!important}
.wrap{width:100%;max-width:var(--wrap);padding-inline:var(--gutter);margin-inline:auto}
.wrap > *, .grid > *, .panel > *{min-width:0}
.no-break{white-space:nowrap}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.sec{padding-top:88px;padding-bottom:88px}
.section-head{max-width:800px;margin-bottom:36px}
.section-head p,.muted{color:var(--text-muted)}
.section-head p{font-size:18px}
.mono{font-family:var(--font-mono)}
.grid{display:grid;gap:24px}
.grid > *{min-width:0}
.grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.panel,.card{padding:28px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-l);box-shadow:var(--panel-shadow)}
.panel-sunken{background:var(--bg-panel-2);box-shadow:inset 0 1px 3px var(--shade-1)}
.rule-section{border-top:1px solid var(--border)}
.btn,.btn-solid,.btn-primary,.btn-secondary,.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:10px 22px;border-radius:var(--radius);border:1px solid var(--transparent);font-weight:700;white-space:nowrap;flex-shrink:0;text-align:center}
.btn-solid,.btn-primary{background:var(--accent);color:var(--bg-panel);box-shadow:inset 0 1px 0 var(--hi-edge-btn),0 12px 26px -12px var(--accent-24),0 1px 2px var(--shade-2);transition:transform var(--fast) var(--ease),background var(--fast) var(--ease)}
.btn-solid{height:48px;padding:0 26px;font-size:16px;letter-spacing:.01em}
.btn-solid:hover,.btn-primary:hover,.state-hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-secondary{border-color:var(--border-strong);background:var(--bg-panel);color:var(--text);box-shadow:inset 0 1px 0 var(--hi-edge)}
.btn-secondary:hover{border-color:var(--text-muted)}
.btn:disabled,.btn-primary:disabled{opacity:.5;transform:none}
.state-focus{outline:2px solid var(--accent);outline-offset:3px}
.text-link{display:inline-flex;align-items:center;gap:6px;min-height:24px;font-size:16px;font-weight:600;color:var(--accent)}
.text-link:hover{color:var(--accent-dark);text-decoration:underline;text-underline-offset:4px}
.cta-row{display:flex;flex-wrap:wrap;align-items:center;gap:28px;min-height:48px}
.badge,.chip{display:inline-flex;align-items:center;min-height:28px;padding:3px 10px;border-radius:var(--radius-pill);background:var(--bg-panel);border:1px solid var(--border);box-shadow:inset 0 1px 0 var(--hi-edge);font-size:12.5px;font-weight:600;color:var(--text);max-width:100%;overflow-wrap:anywhere}
.chips{display:flex;flex-wrap:wrap;gap:6px}
.badge-accent{background:var(--accent-tint);border-color:var(--accent-tint-2);color:var(--accent-dark)}
.status-dot{display:inline-block;width:7px;height:7px;flex-shrink:0;border-radius:var(--radius-round);background:var(--success)}
.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}
.prose{max-width:800px;overflow-wrap:anywhere}
.prose p,.prose li{line-height:1.9}
.prose h2{margin-top:56px;font-size:32px}
.prose h3{margin-top:32px}
.prose ul{list-style:disc;padding-inline-start:24px;margin-bottom:24px}
.prose ol{padding-inline-start:28px;margin-bottom:24px}
.prose a:not(.btn):not(.btn-primary):not(.btn-secondary){color:var(--accent);text-decoration:underline;text-underline-offset:3px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:20px;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-panel-2)}
pre code{white-space:pre;overflow-wrap:normal}
section[id]{scroll-margin-top:var(--anchor-offset)}
#server-status{display:block;position:static;min-width:0;max-width:100%;min-height:120px;overflow:hidden;margin-top:28px;margin-bottom:32px}
#server-status > *{min-width:0;max-width:100%}
#server-status + *{margin-top:32px}
[data-counter]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-mono);text-align:end}
.decor-zone{position:relative;overflow-x:clip;max-width:100%}
.parallax-decor{pointer-events:none;max-width:100%}

/* Navigation */
.masthead{position:relative;z-index:20;border-bottom:1px solid var(--rule-soft);background:var(--transparent)}
#site-header{position:relative;z-index:20;min-height:var(--header-height)}
.masthead-inner{height:var(--header-height);display:flex;align-items:center;gap:36px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.02em;color:var(--text);flex:none;min-height:36px}
.brand img{width:32px;height:32px}
.brand-zh{font-size:15px;font-weight:500;color:var(--text-muted)}
.nav-main{display:flex;align-items:center;flex:1;min-width:0}
.nav-main > ul{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0}
.nav-link{display:inline-flex;align-items:center;height:36px;padding:0 12px;border-radius:var(--radius-s);font-size:14.5px;font-weight:500;color:var(--text-muted);white-space:nowrap}
.nav-link:hover{color:var(--text);background:var(--bg-panel-2)}
.nav-link[aria-current="page"],.nav-menu a[aria-current="page"]{color:var(--text);font-weight:700;background:var(--accent-04)}
.nav-more{position:relative}
.nav-more-btn{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border:0;background:none;border-radius:var(--radius-s);font-size:14.5px;font-weight:500;color:var(--text-muted)}
.nav-more-btn:hover,.nav-more-btn[aria-expanded="true"]{color:var(--text);background:var(--bg-panel-2)}
.nav-menu{position:absolute;top:calc(100% + 8px);left:0;min-width:208px;padding:8px;background:var(--bg-panel);border:1px solid var(--border);border-radius:var(--radius-l);box-shadow:inset 0 1px 0 var(--hi-edge),0 18px 40px -16px var(--accent-14),0 2px 6px var(--shade-1)}
.nav-menu-group + .nav-menu-group{margin-top:6px;padding-top:6px;border-top:1px solid var(--border)}
.nav-menu-label{margin:0;padding:6px 10px 4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.04em;color:var(--text-muted)}
.nav-menu a{display:flex;align-items:center;min-height:36px;padding:7px 10px;border-radius:var(--radius-s);font-size:14px;color:var(--text)}
.nav-menu a:hover{background:var(--bg-panel-2)}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;flex:none}
.language-box{position:relative}
.lang-switch{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-width:44px;width:auto;height:36px;padding:0 12px;border:1px solid var(--border);border-radius:var(--radius);background:none;font-size:13.5px;font-weight:500;color:var(--text-muted);white-space:nowrap}
.lang-switch span{white-space:nowrap}
.lang-switch:hover{color:var(--text);border-color:var(--border-strong)}
.language-menu{left:auto;right:0;min-width:172px}
.btn-login{height:36px;min-height:36px;padding:0 18px;background:var(--bg-panel);border:1px solid var(--border-strong);font-size:14px;font-weight:600;color:var(--text);box-shadow:inset 0 1px 0 var(--hi-edge),0 1px 2px var(--shade-1)}
.btn-login:hover{border-color:var(--text-muted)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:8px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-panel)}
.mobile-drawer{display:none}
.nav-veil{position:fixed;inset:var(--header-height) 0 0;background:var(--shade-3);border:0;width:100%;z-index:21}
html.nav-open{overflow:hidden}

/* Footer */
.site-footer{padding-top:64px;padding-bottom:28px;border-top:1px solid var(--border);background:var(--bg-panel-2)}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr);gap:56px}
.footer-grid > *{min-width:0}
.footer-brand p{margin-top:18px;max-width:330px;font-size:14px;color:var(--text-muted)}
.footer-heading{font-size:14px;font-weight:700;margin-bottom:14px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:13px;color:var(--text-muted)}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:36px;padding-top:24px;border-top:1px solid var(--border-strong)}
.footer-languages [aria-current="page"]{color:var(--text);font-weight:700}
.footer-bottom{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;margin-top:20px;font-size:12px;color:var(--text-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
@media(min-width:1001px){
  .preview-more:hover .nav-menu{display:block!important}
}
@media(max-width:1100px){
  .masthead-inner{gap:20px}
  .nav-link,.nav-more-btn{padding-inline:9px}
  .nav-tools{gap:8px}
}
@media(max-width:1000px){
  .nav-main{display:none}
  .nav-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{position:absolute;top:100%;left:0;right:0;z-index:23;background:var(--bg-panel);border-bottom:1px solid var(--border);max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;padding:16px var(--gutter) 24px;box-shadow:0 24px 40px -24px var(--accent-14)}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 12px;border-radius:var(--radius);font-size:15px}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--bg-panel-2);color:var(--accent-dark)}
  .drawer-languages{border-top:1px solid var(--border);margin-top:14px;padding-top:12px}
  .footer-grid{gap:28px}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,6vw,40px);line-height:1.15}
  .grid-three{grid-template-columns:1fr}
  .sec{padding-top:56px;padding-bottom:56px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1 / -1}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .wrap{width:100%;padding-inline:var(--gutter)}
  .grid-two,.footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .masthead-inner{gap:10px}
  .nav-tools{gap:6px;margin-left:auto}
  .brand{gap:7px;font-size:17px}
  .brand img{width:28px;height:28px}
  .lang-switch{padding-inline:8px;min-width:36px;font-size:12px}
  .btn-login{padding-inline:12px}
  .panel,.card{padding:22px}
  .tilt{transform:none!important}
  .decor-zone,.parallax-decor{max-width:100%}
  .cta-row{gap:18px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}