:root{
  color-scheme:light;
  --bg:#FBF9F6;
  --panel:#FFFFFF;
  --panel-2:#F4F1EC;
  --border:#E7E2DA;
  --border-strong:#D6CFC4;
  --cream:#F8EDE3;
  --accent:#EE7A35;
  --accent-hi:#F28B4C;
  --accent-dark:#C25A1A;
  --amber:#F2A23C;
  --text:#2E2F35;
  --text-muted:#6E6C68;
  --text-faint:#9A968F;
  --success:#2F9B5C;
  --success-soft:#E7F3EC;
  --success-line:rgba(47,155,92,.22);
  --indigo:#5A63C8;
  --indigo-soft:#ECEDFA;
  --indigo-line:rgba(90,99,200,.2);
  --warn:#D99A1E;
  --error:#D2453A;
  --light-r:#EBA79D;
  --light-y:#EDCD8E;
  --light-g:#B3D6BC;
  --light-ring:rgba(46,47,53,.08);
  --tint-accent-05:rgba(238,122,53,.055);
  --tint-accent-08:rgba(238,122,53,.08);
  --shadow-accent:rgba(238,122,53,.10);
  --shadow-accent-strong:rgba(238,122,53,.24);
  --shadow-ink:rgba(46,47,53,.08);
  --shadow-ink-strong:rgba(46,47,53,.28);
  --hl:rgba(255,255,255,.92);
  --hl-soft:rgba(255,255,255,.28);
  --veil:rgba(46,47,53,.28);
  --flag-red:#D8343F;
  --flag-navy:#2E3770;
  --flag-green:#1E8A4F;
  --flag-white:#FFFFFF;
  --flag-line:rgba(46,47,53,.12);
  --clear:transparent;
  --font-display:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Noto Sans JP","Apple SD Gothic Neo","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Hiragino Sans","Apple SD Gothic Neo","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --weight-normal:400;
  --weight-medium:500;
  --weight-semibold:600;
  --weight-bold:700;
  --fs-xs:12px;
  --fs-small:14px;
  --fs-body:16px;
  --fs-lead:20px;
  --fs-h1:clamp(52px,4.45vw,64px);
  --fs-h2:clamp(28px,3vw,40px);
  --fs-h3:24px;
  --fs-brand:19px;
  --fs-nav:15px;
  --fs-tool:14.5px;
  --fs-caption:13px;
  --fs-micro:11.5px;
  --fs-chip:12.5px;
  --fs-trust:13.5px;
  --fs-hero-lead:16.5px;
  --fs-hero-mobile:38px;
  --fs-hero-narrow:34px;
  --fs-doc-mobile:21px;
  --fs-price:40px;
  --tracking-display:-.03em;
  --tracking-heading:-.02em;
  --tracking-button:-.005em;
  --tracking-label:.02em;
  --r-pill:999px;
  --r-feature:28px;
  --r-xl:20px;
  --r-lg:14px;
  --r-md:10px;
  --r-sm:8px;
  --r-chip:9px;
  --r-avatar:7px;
  --r-flag:4px;
  --r-mini:3px;
  --r-line:2px;
  --r-round:50%;
  --container:1200px;
  --reading:800px;
  --gutter:24px;
  --header-height:60px;
  --anchor-offset:80px;
  --toc-offset:12px;
  --toc-clearance:100px;
  --space-1:8px;
  --space-2:16px;
  --space-3:24px;
  --space-4:32px;
  --space-6:48px;
  --space-8:64px;
  --space-10:80px;
  --ease: .2s ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;position:relative;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body::before{content:"";position:absolute;inset:0 0 auto;height:820px;background:linear-gradient(180deg,var(--tint-accent-05) 0%,var(--tint-accent-05) 18%,var(--clear) 100%);pointer-events:none;z-index:0}
main,.site-footer{position:relative}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
button,summary,[role="tab"],.language-links a{min-height:24px}
:focus-visible{outline:2px solid var(--text);outline-offset:3px;border-radius:var(--r-sm)}
[hidden]{display:none!important}
h1,h2,h3,h4,p{margin-top:0}
h1,h2,h3{font-family:var(--font-display);font-weight:var(--weight-bold);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--fs-h1);line-height:1.12;letter-spacing:var(--tracking-heading)}
h2{font-size:var(--fs-h2);line-height:1.22;letter-spacing:var(--tracking-heading);margin-bottom:var(--space-3)}
h3{font-size:var(--fs-h3);line-height:1.3;letter-spacing:var(--tracking-heading)}
p{margin-bottom:var(--space-2)}
ul,ol{padding-left:var(--space-3)}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:var(--space-3);background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r-md)}
pre code{overflow-wrap:normal;white-space:pre}
.wrap{width:100%;max-width:calc(var(--container) + var(--gutter)*2);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{max-width:calc(var(--reading) + var(--gutter)*2)}
.section{padding-top:var(--space-8);padding-bottom:var(--space-8)}
.section-head{max-width:var(--reading);margin-bottom:var(--space-4)}
.section-head p,.muted{color:var(--text-muted)}
.lead{font-size:var(--fs-lead);color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.svg-defs{position:absolute;width:0;height:0;overflow:hidden}
.ico{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.clean-list{list-style:none;margin:0;padding:0}
.grid{display:grid;gap:var(--space-3)}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-five{grid-template-columns:repeat(5,minmax(0,1fr))}
.grid>*,.wrap>*,.panel>*,.card>*{min-width:0}
.panel,.card{min-width:0;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-xl);box-shadow:inset 0 1px 0 var(--hl),0 16px 40px -24px var(--shadow-accent)}
.panel{padding:var(--space-4)}
.card{padding:var(--space-3)}
.prose{overflow-wrap:break-word}
.prose p,.prose li{line-height:1.85}
.prose a{text-decoration:underline;text-underline-offset:4px}
.prose h2{margin-top:var(--space-8)}
.prose h3{margin-top:var(--space-4)}
.prose li+li{margin-top:var(--space-1)}
.prose img{border-radius:var(--r-lg)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:10px 28px;border:0;border-radius:var(--r-pill);font-size:var(--fs-body);font-weight:var(--weight-semibold);letter-spacing:var(--tracking-button);text-align:center;white-space:nowrap;flex-shrink:0;transition:transform var(--ease),box-shadow var(--ease),background-color var(--ease),color var(--ease)}
.btn-primary{color:var(--panel);background:linear-gradient(180deg,var(--accent-hi),var(--accent));box-shadow:inset 0 1px 0 var(--hl-soft),0 12px 26px -12px var(--shadow-accent-strong)}
.btn-primary:hover,.btn-primary.is-hover{transform:translateY(-1px);box-shadow:inset 0 1px 0 var(--hl-soft),0 16px 30px -12px var(--shadow-accent-strong)}
.btn-primary:active,.btn-primary.is-active{background:var(--accent-dark);transform:none}
.btn-outline,.btn-secondary{color:var(--text);border:1.5px solid var(--text);background:var(--clear)}
.btn-outline:hover,.btn-secondary:hover{background:var(--text);color:var(--panel)}
.btn:disabled,.btn[aria-disabled="true"]{cursor:not-allowed;background:var(--panel-2);color:var(--text-muted);box-shadow:none;border:1px solid var(--border-strong)}
.btn-small{min-height:38px;padding:7px 20px;font-size:var(--fs-small)}
.btn.is-focus{outline:2px solid var(--text);outline-offset:3px}
.site-head,#site-header{position:relative;z-index:60}
.head-inner{width:min(100% - 48px,var(--container));margin:0 auto;height:var(--header-height);display:flex;align-items:center;gap:44px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:var(--weight-bold);font-size:var(--fs-brand);letter-spacing:var(--tracking-heading);white-space:nowrap;flex-shrink:0}
.brand-mark{display:block;width:30px;height:30px;filter:drop-shadow(0 4px 8px var(--shadow-accent-strong))}
.brand-word{display:inline}
.main-nav{display:flex;align-items:center;flex:1;min-width:0;font-size:var(--fs-nav);color:var(--text-muted)}
.main-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:30px}
.main-nav li{flex-shrink:0}
.main-nav a{display:inline-flex;align-items:center;min-height:32px;padding:6px 0;white-space:nowrap;transition:color var(--ease)}
.main-nav a:hover{color:var(--text)}
.main-nav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-semibold)}
.head-actions{margin-left:auto;display:flex;align-items:center;gap:12px;flex-shrink:0}
.language-picker{position:relative}
.lang{appearance:none;display:inline-flex;align-items:center;justify-content:center;gap:5px;min-width:44px;min-height:38px;width:auto;border:0;background:var(--clear);font-size:var(--fs-tool);color:var(--text-muted);padding:6px 10px;border-radius:var(--r-pill);white-space:nowrap;cursor:pointer}
.lang:hover{color:var(--text);background:var(--panel-2)}
.language-panel{position:absolute;right:0;top:calc(100% + 8px);z-index:90;min-width:172px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-lg);box-shadow:0 16px 40px -12px var(--shadow-ink-strong)}
.language-panel a{display:flex;align-items:center;min-height:40px;padding:8px 12px;border-radius:var(--r-sm);white-space:nowrap}
.language-panel a:hover,.language-panel a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 22px;border:1.5px solid var(--text);border-radius:var(--r-pill);font-size:var(--fs-tool);font-weight:var(--weight-semibold);white-space:nowrap;transition:background-color var(--ease),color var(--ease)}
.btn-login:hover{background:var(--text);color:var(--panel)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel);color:var(--text)}
.menu-toggle svg{width:20px;height:20px}
.mobile-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--border);background:linear-gradient(180deg,var(--panel-2),var(--bg));padding-top:var(--space-8);padding-bottom:var(--space-4)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1.3fr;gap:var(--space-6)}
.footer-brand{min-width:0}
.footer-brand p{max-width:330px;margin-top:var(--space-2);font-size:var(--fs-small);color:var(--text-muted)}
.footer-title{font-size:var(--fs-small);font-weight:var(--weight-bold);margin-bottom:var(--space-2)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px;list-style:none;margin:0;padding:0}
.footer-links a,.language-links a,.footer-legal a{display:inline-flex;align-items:center;min-height:30px;font-size:var(--fs-small);color:var(--text-muted)}
.footer-links a:hover,.footer-legal a:hover,.language-links a:hover{color:var(--text);text-decoration:underline;text-underline-offset:4px}
.language-links{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:var(--space-4);padding-top:var(--space-3);border-top:1px solid var(--border)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:var(--space-2);margin-top:var(--space-3);font-size:var(--fs-small);color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.reveal{transition:opacity .35s ease,transform .35s ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:flow-root;min-height:120px;max-width:100%;overflow:hidden;margin-block:var(--space-4)}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:var(--space-4)}
@media(max-width:1180px){
  .head-inner{gap:28px}
  .main-nav ul{gap:20px}
}
@media(max-width:1024px){
  .head-inner{gap:20px}
  .main-nav ul{gap:16px}
  .head-actions{gap:6px}
}
@media(max-width:900px){
  .head-inner{width:100%;padding-inline:var(--gutter);gap:12px;flex-wrap:nowrap;position:relative;z-index:80;background:var(--bg)}
  .head-actions{margin-left:auto}
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{position:fixed;top:var(--header-height);left:0;right:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;padding:var(--space-3) var(--gutter);background:var(--panel);z-index:70;border-top:1px solid var(--border)}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;border-radius:var(--r-sm)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--panel-2)}
  .drawer-languages{margin-top:var(--space-3);padding-top:var(--space-2);border-top:1px solid var(--border)}
  .nav-veil:not([hidden]){display:block;position:fixed;inset:var(--header-height) 0 0;background:var(--veil);z-index:65;border:0}
  .grid-five{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:768px){
  h1{font-size:var(--fs-hero-mobile)}
  .grid-three{grid-template-columns:1fr}
  .panel{padding:var(--space-3)}
  .section{padding-top:var(--space-6);padding-bottom:var(--space-6)}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  h1{font-size:var(--fs-hero-narrow)}
  .brand{font-size:var(--fs-body);gap:7px}
  .brand-mark{width:26px;height:26px}
  .head-inner{gap:6px}
  .head-actions{gap:4px;margin-left:auto}
  .btn-login{padding-inline:13px;font-size:var(--fs-small)}
  .lang{padding-inline:5px;font-size:var(--fs-xs)}
  .grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr;gap:var(--space-4)}
  .footer-brand{grid-column:auto}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .decorative{max-width:100%}
}
@media(max-width:350px){
  .brand{font-size:var(--fs-small);gap:5px}
  .brand-mark{width:24px;height:24px}
  .head-actions{gap:2px}
  .btn-login{padding-inline:9px}
  .lang{font-size:var(--fs-micro);padding-inline:3px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}