:root{
  --bg:#ECEEF7;
  --bg-hero-top:#F4F5FB;
  --bg-hero-bottom:#E6E9F4;
  --panel:#F8F9FD;
  --panel-2:#DFE3F0;
  --panel-2-hi:#E6E9F4;
  --border:#D2D7E8;
  --accent:#F0622E;
  --accent-dark:#C24519;
  --accent-light:#F79A6C;
  --accent-glow:#FFC7A4;
  --lavender:#B9A8F0;
  --lavender-deep:#8D7CD8;
  --lavender-pale:#E3DCFA;
  --sky:#9CC4F2;
  --sky-deep:#6C9EDB;
  --sky-pale:#D9E8FA;
  --text:#15172A;
  --ink-2:#2B2E47;
  --text-muted:#5C6178;
  --text-faint:#868CA6;
  --text-ghost:#A6ABC1;
  --success:#1E9E6A;
  --warn:#C98A12;
  --error:#D2394B;
  --white:#FFFFFF;
  --flag-red:#D33A48;
  --flag-navy:#24326A;
  --flag-green:#2F8B5A;
  --flag-white:#FFFFFF;
  --accent-08:rgba(240,98,46,.08);
  --accent-10:rgba(240,98,46,.10);
  --accent-14:rgba(240,98,46,.14);
  --accent-28:rgba(240,98,46,.28);
  --accent-dark-45:rgba(194,69,25,.45);
  --lavender-35:rgba(185,168,240,.35);
  --lavender-deep-40:rgba(141,124,216,.40);
  --sky-deep-40:rgba(108,158,219,.40);
  --white-18:rgba(255,255,255,.18);
  --white-35:rgba(255,255,255,.35);
  --white-55:rgba(255,255,255,.55);
  --white-62:rgba(255,255,255,.62);
  --white-72:rgba(255,255,255,.72);
  --white-85:rgba(255,255,255,.85);
  --white-92:rgba(255,255,255,.92);
  --ink-06:rgba(21,23,42,.06);
  --ink-10:rgba(21,23,42,.10);
  --ink-16:rgba(21,23,42,.16);
  --ink-32:rgba(21,23,42,.32);
  --success-18:rgba(30,158,106,.18);
  --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;
  --r-tray:32px;
  --r-card:18px;
  --r-small:12px;
  --r-mobile:24px;
  --r-pill:999px;
  --r-round:50%;
  --wrap:1232px;
  --gutter:40px;
  --head-height:72px;
  --anchor-gap:88px;
  --toc-offset:16px;
  --toc-anchor:104px;
  --shadow-panel:0 24px 64px -24px var(--accent-10),inset 0 1px 0 var(--white);
  --shadow-button:inset 0 1px 0 var(--white-18),0 12px 26px -12px var(--ink-32);
  --ease-out:cubic-bezier(.2,.7,.2,1);
  --duration-fast:.2s;
  --duration-reveal:.35s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{
  margin:0;font-family:var(--font-body);font-size:16px;line-height:1.7;color:var(--text);
  background-color:var(--bg);
  background-image:linear-gradient(180deg,var(--bg-hero-top) 0px,var(--bg-hero-bottom) 880px,var(--bg) 1040px);
  background-repeat:no-repeat;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-underline-offset:4px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,input,summary,select,textarea{-webkit-tap-highlight-color:var(--accent-08)}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent-dark);outline-offset:3px}
button:disabled,[aria-disabled="true"]{cursor:not-allowed}
img,video{max-width:100%;height:auto}
svg{vertical-align:middle;flex-shrink:0}
[hidden]{display:none!important}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin-top:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;text-wrap:balance;overflow-wrap:break-word}
h1,.h1{font-size:64px;line-height:1.08;letter-spacing:-.03em}
h2,.section-title{font-size:48px;line-height:1.2;letter-spacing:-.02em}
h3{font-size:24px;line-height:1.35;letter-spacing:-.01em}
p{margin-bottom:20px}
hr{border:0;border-top:1px solid var(--border);margin-block:32px}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;overflow-x:auto;padding:24px;border-radius:var(--r-card);background:var(--panel-2);color:var(--text)}
pre code{overflow-wrap:normal;white-space:pre}
.wrap{width:100%;max-width:calc(var(--wrap) + var(--gutter)*2);padding-inline:var(--gutter);margin-inline:auto}
.wrap>*,:where(.grid,.head-row,.hero-top,.footer-grid)>*{min-width:0}
.section{padding-top:80px;padding-bottom:80px}
.section-head{margin-bottom:32px;max-width:760px}
.section-head p{color:var(--text-muted)}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.small{font-size:14px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
.panel,.card{padding:32px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--panel);box-shadow:var(--shadow-panel)}
.panel-inset{padding:32px;border-radius:var(--r-tray);background:var(--panel-2);box-shadow:inset 0 1px 0 var(--white-55)}
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.stack>*+*{margin-top:24px}
.prose{max-width:820px;overflow-wrap:break-word}
.prose p,.prose li{line-height:1.9}
.prose h2{margin-top:64px;font-size:36px}
.prose h3{margin-top:36px}
.prose li+li{margin-top:8px}
.prose img{border-radius:var(--r-card)}
.prose a{color:var(--accent-dark)}
.prose section[id]{scroll-margin-top:var(--anchor-gap)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;flex-shrink:0;
  min-height:48px;padding:0 26px;border:0;border-radius:var(--r-pill);
  font-family:var(--font-body);font-size:16px;font-weight:500;line-height:1.3;text-decoration:none;white-space:nowrap;
  transition:transform var(--duration-fast) ease,background-color var(--duration-fast) ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-ink,.btn-primary{color:var(--white);background:linear-gradient(180deg,var(--ink-2),var(--text));box-shadow:var(--shadow-button)}
.btn-ghost,.btn-secondary{color:var(--text);background:var(--white);box-shadow:0 0 0 1px var(--border),inset 0 1px 0 var(--white),0 2px 6px var(--ink-06)}
.btn-ghost:hover,.btn-secondary:hover{background:var(--panel)}
.btn-sm{min-height:44px;padding:0 22px;font-size:15px}
.btn:active,.btn.is-pressed{transform:translateY(1px)}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55;transform:none;pointer-events:none}
.text-link{display:inline-flex;align-items:center;gap:8px;min-height:32px;color:var(--accent-dark)}
.reveal{transition:opacity var(--duration-reveal) ease,transform var(--duration-reveal) var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{display:flow-root;position:static;min-height:120px;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:32px}
#server-status :where(.grid,[class*="grid"]){max-width:100%;min-width:0}
[data-stat]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-mono);text-align:end}
[data-stat="refund"]{min-width:1ch}
.decorative-section,[data-hero-visual]{overflow-x:clip;max-width:100%}
.site-head,#site-header{position:relative;z-index:50}
.head-row{display:flex;align-items:center;flex-wrap:nowrap;gap:40px;height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;text-decoration:none;color:var(--text);min-height:40px}
.brand-logo{display:block;width:32px;height:32px;flex-shrink:0;border-radius:var(--r-round)}
.brand-name{font-family:var(--font-display);font-size:19px;font-weight:600;letter-spacing:-.02em;white-space:nowrap}
.nav{flex:1;min-width:0}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0}
.nav li{display:flex;align-items:center;flex-shrink:0}
.nav li+li::before{content:"·";color:var(--text-ghost);margin:0 12px;font-size:15px}
.nav a{display:inline-flex;align-items:center;min-height:32px;font-size:15px;color:var(--text-muted);text-decoration:none;padding:6px 0;white-space:nowrap;transition:color var(--duration-fast)}
.nav a:hover{color:var(--text)}
.nav a[aria-current="page"]{color:var(--text);font-weight:500}
.head-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.language-picker{position:relative}
.lang{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:40px;padding:0 14px;
  border:0;border-radius:var(--r-pill);background:transparent;font:inherit;font-size:14px;color:var(--text-muted);white-space:nowrap;
}
.lang:hover{background:var(--white-55)}
.lang svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.6}
.lang-label{white-space:nowrap}
.lang-caret{font-size:11px;color:var(--text-faint)}
.lang-panel{position:absolute;z-index:70;right:0;top:calc(100% + 8px);min-width:180px;padding:8px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--panel);box-shadow:var(--shadow-panel)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 14px;border-radius:var(--r-small);text-decoration:none;color:var(--text-muted)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2);color:var(--text)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;height:40px;padding:0 22px;border-radius:var(--r-pill);text-decoration:none;font-size:15px;font-weight:500;white-space:nowrap;color:var(--white);background:linear-gradient(180deg,var(--ink-2),var(--text));box-shadow:inset 0 1px 0 var(--white-18),0 8px 18px -10px var(--ink-32)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:5px;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--panel);color:var(--text)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-pill)}
.mobile-drawer{display:none}
.menu-veil{display:none}
.site-footer{padding-top:64px;padding-bottom:32px;margin-top:64px;border-top:1px solid var(--border);background:var(--panel)}
.footer-grid{display:grid;grid-template-columns:1.15fr 1fr 1fr;gap:64px}
.footer-brand p{max-width:30em;color:var(--text-muted);font-size:14px;margin-top:20px}
.footer-title{font-size:15px;font-weight:500;margin-bottom:16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 20px;list-style:none;margin:0;padding:0}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;color:var(--text-muted);font-size:14px;text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--accent-dark)}
.footer-languages{display:flex;flex-wrap:wrap;gap:12px 24px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}
.footer-languages a[aria-current="true"]{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:24px;font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:24px}
@media(max-width:1200px){
  .head-row{gap:24px}
  .nav li+li::before{margin:0 8px}
  .nav a{font-size:14px}
}
@media(max-width:1100px){
  .head-row{gap:16px}
  .nav li+li::before{margin:0 6px}
  .lang{padding-inline:10px}
}
@media(max-width:1020px){
  .nav{display:none}
  .head-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{
    display:block;position:fixed;z-index:45;top:var(--head-height);left:0;right:0;
    height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));
    overflow-y:auto;overscroll-behavior:contain;padding:24px var(--gutter) 40px;background:var(--panel);border-top:1px solid var(--border);
  }
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;text-decoration:none;border-radius:var(--r-small);color:var(--text-muted)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current]{background:var(--panel-2);color:var(--text)}
  .mobile-drawer ul{list-style:none;margin:0;padding:0}
  .drawer-languages{margin-top:24px;padding-top:16px;border-top:1px solid var(--border)}
  .menu-veil{display:block;position:fixed;z-index:40;inset:var(--head-height) 0 0;background:var(--ink-32)}
  .footer-grid{gap:32px}
}
@media(max-width:768px){
  h1,.h1{font-size:40px;line-height:1.12}
  h2,.section-title{font-size:34px}
  .section{padding-top:56px;padding-bottom:56px}
  .grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:20px}
  .no-break{white-space:normal}
  .wrap{width:100%;padding-inline:var(--gutter)}
  .head-row{gap:8px}
  .head-tools{margin-left:auto;gap:4px}
  .brand{gap:7px}
  .brand-name{font-size:17px}
  .brand-logo{width:28px;height:28px}
  .btn-login{padding-inline:15px;font-size:14px}
  .lang{padding-inline:8px}
  .lang-label,.lang-caret{display:none}
  .lang-panel .lang-label{display:inline}
  .grid-2{grid-template-columns:1fr}
  .panel,.card,.panel-inset{padding:24px}
  .prose h2{font-size:30px}
  .tilt,[data-tilt]{transform:none}
  .decorative-section,[data-hero-visual]{max-width:100%;overflow-x:clip}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-links{gap:8px 16px}
  .footer-bottom{flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}