:root{
  --color-page:#FBFAF8;
  --color-surface:#FFFFFF;
  --color-surface-soft:#F4F2EE;
  --color-line:#E6E3DD;
  --color-brand:#E4611F;
  --color-brand-deep:#B84A12;
  --color-brand-soft:#FBEADF;
  --color-ink:#262420;
  --color-ink-muted:#6F6A61;
  --color-success:#3E9B63;
  --color-success-soft:#E7F3EB;
  --color-warning:#C08A1E;
  --color-warning-soft:#F8EFD9;
  --color-error:#C2453A;
  --color-error-soft:#F8E7E5;
  --color-info:#5753A6;
  --color-info-soft:#ECEBF8;
  --color-overlay:rgba(38,36,32,.38);
  --color-shadow-light:rgba(38,36,32,.04);
  --color-shadow-mid:rgba(38,36,32,.07);
  --color-shadow-deep:rgba(38,36,32,.18);
  --color-brand-shadow:rgba(184,74,18,.24);
  --color-brand-glow:rgba(228,97,31,.09);
  --font-display:'Inter','Noto Sans SC',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-body:'Inter','Noto Sans SC',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,Consolas,'Courier New',monospace;
  --radius-xs:6px;
  --radius-sm:8px;
  --radius-md:14px;
  --radius-lg:20px;
  --radius-xl:22px;
  --radius-section:28px;
  --radius-pill:999px;
  --shadow-lift:0 1px 2px var(--color-shadow-light),0 2px 6px var(--color-shadow-light);
  --shadow-panel:0 2px 8px var(--color-shadow-light),0 14px 30px -18px var(--color-shadow-deep);
  --shadow-float:0 2px 8px var(--color-shadow-light),0 30px 60px -24px var(--color-shadow-deep);
  --shadow-pop:0 6px 14px var(--color-shadow-mid),0 22px 44px -16px var(--color-brand-shadow);
  --content-width:1128px;
  --wide-width:1280px;
  --reading-width:780px;
  --header-height:60px;
  --gutter:clamp(16px,4vw,32px);
  --section-space:clamp(72px,10vw,136px);
  --transition-fast:160ms ease;
  --transition-reveal:560ms cubic-bezier(.22,.8,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--color-page)}
html.nav-open{overflow:hidden}
body{margin:0;min-width:320px;background:var(--color-page);color:var(--color-ink);font-family:var(--font-body);font-size:15px;line-height:1.68;-webkit-font-smoothing:antialiased}
body,main,section,article,header,footer{max-width:100%}
img,video,canvas{display:block;max-width:100%;height:auto}
svg{display:block;flex-shrink:0}
button,input,select,textarea{font:inherit}
button{color:inherit}
a{color:inherit;text-decoration:none}
p,h1,h2,h3,h4,ul,ol,dl,dd,figure,blockquote,pre{margin:0}
ul,ol{padding:0}
ul{list-style:none}
table{border-collapse:collapse;border-spacing:0}
[hidden]{display:none!important}
:focus-visible{outline:3px solid var(--color-brand-soft);outline-offset:3px}
::selection{background:var(--color-brand-soft);color:var(--color-ink)}
.wrap,.wide-wrap,.reading-wrap{width:100%;margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.wrap{max-width:calc(var(--content-width) + var(--gutter) * 2)}
.wide-wrap{max-width:min(100%,calc(var(--wide-width) + var(--gutter) * 2))}
.reading-wrap{max-width:calc(var(--reading-width) + var(--gutter) * 2)}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space);overflow-x:clip}
.section-head{max-width:760px;margin-bottom:clamp(32px,5vw,56px)}
.section-head.is-centered{margin-inline:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--color-brand-deep);font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.eyebrow-dot{width:8px;height:8px;border-radius:50%;background:var(--color-brand);flex-shrink:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;line-height:1.2;text-wrap:balance}
h1,.hero-title{font-size:clamp(34px,3.4vw,48px);letter-spacing:-.015em}
h2{font-size:clamp(28px,3.2vw,40px);letter-spacing:-.012em}
h3{font-size:clamp(20px,2vw,26px)}
h4{font-size:18px}
.title-keep{white-space:nowrap}
.lead{font-size:clamp(17px,2vw,20px);color:var(--color-ink-muted);line-height:1.7}
.muted{color:var(--color-ink-muted)}
.mono{font-family:var(--font-mono)}
.prose{min-width:0;color:var(--color-ink)}
.prose>*+*{margin-top:1.15em}
.prose h2{margin-top:2.4em}
.prose h3{margin-top:1.8em}
.prose a{color:var(--color-brand-deep);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
.prose ul,.prose ol{padding-left:1.4em}
.prose ul{list-style:disc}
.prose ol{list-style:decimal}
.prose li+li{margin-top:.45em}
code{font-family:var(--font-mono);font-size:.92em;overflow-wrap:anywhere}
:not(pre)>code{padding:.14em .4em;border:1px solid var(--color-line);border-radius:var(--radius-xs);background:var(--color-surface-soft);color:var(--color-ink)}
pre{max-width:100%;overflow-x:auto;padding:20px;border:1px solid var(--color-line);border-radius:var(--radius-md);background:var(--color-ink);color:var(--color-surface);font-family:var(--font-mono);font-size:13px;line-height:1.7;-webkit-overflow-scrolling:touch}
pre code{color:inherit;overflow-wrap:normal;white-space:pre}
.data-table,.prose>table{width:100%;min-width:640px;background:var(--color-surface);color:var(--color-ink)}
.table-scroll,.prose>.data-table{display:block;max-width:100%;min-width:0;overflow-x:auto;-webkit-overflow-scrolling:touch}
th,td{padding:14px 16px;border:1px solid var(--color-line);text-align:left;vertical-align:top}
th{background:var(--color-surface-soft);color:var(--color-ink);font-weight:650}
.button,.btn-main,.btn-sub{
  display:inline-flex;min-height:44px;max-width:100%;align-items:center;justify-content:center;gap:8px;
  padding:11px 24px;border:1px solid transparent;border-radius:var(--radius-pill);
  font-weight:650;line-height:1.35;text-align:center;cursor:pointer;transition:background var(--transition-fast),border-color var(--transition-fast),transform var(--transition-fast)
}
.button svg,.btn-main svg,.btn-sub svg{width:16px;height:16px}
.button-primary,.btn-main{background:var(--color-brand);color:var(--color-surface);box-shadow:0 2px 6px var(--color-brand-shadow),0 10px 22px -10px var(--color-brand-shadow)}
.button-primary:hover,.btn-main:hover{background:var(--color-brand-deep);color:var(--color-surface)}
.button-secondary,.btn-sub{border-color:var(--color-line);background:var(--color-surface);color:var(--color-ink);box-shadow:var(--shadow-lift)}
.button-secondary:hover,.btn-sub:hover{border-color:var(--color-ink-muted);background:var(--color-surface);color:var(--color-ink)}
.button-quiet{border-color:transparent;background:transparent;color:var(--color-ink)}
.button-quiet:hover{background:var(--color-surface-soft);color:var(--color-ink)}
.button[disabled],.button.is-disabled{cursor:not-allowed;opacity:.55;transform:none}
.button-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}
.panel,.card{
  min-width:0;border:1px solid var(--color-line);border-radius:var(--radius-lg);
  background:var(--color-surface);color:var(--color-ink);box-shadow:var(--shadow-lift)
}
.panel{padding:clamp(24px,4vw,48px)}
.panel-soft{background:var(--color-surface-soft);color:var(--color-ink)}
.card{padding:24px}
.tilt{transform:rotate(.45deg)}
.reveal{opacity:0;transform:translateY(18px);transition:opacity var(--transition-reveal),transform var(--transition-reveal)}
.reveal.shown{opacity:1;transform:none}
.site-topbar{position:relative;z-index:100;border-bottom:1px solid var(--color-line);background:var(--color-page);color:var(--color-ink)}
.site-topbar-inner{
  width:100%;max-width:min(100%,calc(1280px + var(--gutter) * 2));height:var(--header-height);
  margin-inline:auto;padding-inline:var(--gutter);display:flex;align-items:center;gap:24px
}
.site-brand{display:flex;align-items:center;gap:10px;flex:none}
.site-brand img{width:28px;height:28px;flex-shrink:0}
.site-brand-name{font-size:15px;font-weight:650;letter-spacing:.01em;white-space:nowrap}
.desktop-nav{display:flex;align-items:center;gap:2px;margin-left:auto}
.desktop-nav a{display:flex;min-height:38px;align-items:center;gap:6px;padding:7px 10px;border-radius:var(--radius-pill);color:var(--color-ink-muted);font-size:13px}
.desktop-nav a:hover,.desktop-nav a.is-active{background:var(--color-surface-soft);color:var(--color-ink)}
.desktop-nav a.is-active{font-weight:650}
.desktop-nav svg,.mobile-drawer svg{width:14px;height:14px;fill:none;stroke:currentColor;stroke-width:1.4;stroke-linecap:round;stroke-linejoin:round}
.header-tools{display:flex;align-items:center;gap:8px;flex:none}
.language-switch{position:relative}
.language-button{
  display:flex;min-height:38px;align-items:center;gap:6px;padding:6px 13px;border:1px solid var(--color-line);
  border-radius:var(--radius-pill);background:var(--color-surface);color:var(--color-ink-muted);cursor:pointer
}
.language-button:hover{color:var(--color-ink)}
.language-short{display:none}
.language-menu{
  position:absolute;top:calc(100% + 8px);right:0;z-index:6;width:168px;padding:7px;border:1px solid var(--color-line);
  border-radius:var(--radius-md);background:var(--color-surface);color:var(--color-ink);box-shadow:var(--shadow-panel)
}
.language-menu a{display:block;width:100%;min-height:42px;padding:9px 11px;border-radius:var(--radius-sm)}
.language-menu a:hover,.language-menu a.is-current{background:var(--color-surface-soft);color:var(--color-ink)}
.menu-toggle{display:none;min-width:44px;min-height:44px;padding:10px;border:0;border-radius:var(--radius-pill);background:transparent;color:var(--color-ink);cursor:pointer}
.menu-toggle-lines,.menu-toggle-lines::before,.menu-toggle-lines::after{display:block;width:20px;height:1.5px;background:currentColor;content:""}
.menu-toggle-lines{position:relative}
.menu-toggle-lines::before{position:absolute;top:-6px}
.menu-toggle-lines::after{position:absolute;top:6px}
.mobile-veil{display:none}
.mobile-drawer{display:none}
.site-footer{margin-top:var(--section-space);border-top:1px solid var(--color-line);background:var(--color-surface);color:var(--color-ink)}
.footer-grid{display:grid;grid-template-columns:minmax(260px,1.4fr) repeat(3,minmax(150px,1fr));gap:48px;padding-top:64px;padding-bottom:52px}
.footer-brand{max-width:340px}
.footer-brand-line{display:flex;align-items:center;gap:10px;margin-bottom:14px;font-weight:650}
.footer-brand-line img{width:30px;height:30px}
.footer-brand p{color:var(--color-ink-muted)}
.footer-title{margin-bottom:14px;font-size:13px;font-weight:700}
.footer-links{display:grid;gap:8px}
.footer-links a{color:var(--color-ink-muted)}
.footer-links a:hover{color:var(--color-brand-deep)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:18px;padding-top:22px;padding-bottom:28px;border-top:1px solid var(--color-line);color:var(--color-ink-muted);font-size:13px}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.hero-platforms{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:8px}
.platform-chip{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;border:1px solid var(--color-line);border-radius:var(--radius-pill);background:var(--color-surface);color:var(--color-ink-muted);font-size:12.5px}
.platform-chip svg{width:13px;height:13px;fill:currentColor}
.decorative-zone{position:relative;overflow-x:clip}
.full-bleed-decoration{position:absolute;inset-inline:0;pointer-events:none}
@media(max-width:1100px){
  .desktop-nav{gap:0}
  .desktop-nav a{padding-inline:7px}
  .site-topbar-inner{gap:14px}
}
@media(max-width:960px){
  .desktop-nav,.language-switch{display:none}
  .header-tools{margin-left:auto}
  .menu-toggle{display:grid;place-items:center}
  .mobile-veil{position:fixed;inset:var(--header-height) 0 0;z-index:98;background:var(--color-overlay)}
  .mobile-veil.is-open{display:block}
  .mobile-drawer{
    position:absolute;top:var(--header-height);right:0;left:0;z-index:101;
    max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;
    padding:10px var(--gutter) 20px;border-bottom:1px solid var(--color-line);
    background:var(--color-surface);color:var(--color-ink);box-shadow:var(--shadow-panel)
  }
  .mobile-drawer.is-open{display:block}
  .mobile-drawer ul{display:grid;gap:2px}
  .mobile-drawer a{display:flex;width:100%;min-height:46px;align-items:center;gap:10px;padding:11px 12px;border-radius:var(--radius-sm)}
  .mobile-drawer a:hover,.mobile-drawer a.is-active{background:var(--color-surface-soft);color:var(--color-ink)}
  .mobile-language{margin-top:10px;padding-top:10px;border-top:1px solid var(--color-line)}
  .mobile-language strong{display:block;padding:8px 12px;color:var(--color-ink-muted);font-size:12px}
}
@media(max-width:768px){
  h1,.hero-title{font-size:clamp(24px,7vw,30px);line-height:1.16;letter-spacing:-.012em}
  h2{font-size:clamp(25px,7vw,32px)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .footer-brand{grid-column:1/-1}
}
@media(max-width:640px){
  :root{--gutter:16px;--section-space:72px}
  .tilt,[class*="tilt"]{transform:none}
  .button-row{align-items:stretch}
  .button-row .button,.button-row .btn-main,.button-row .btn-sub{flex:1 1 100%}
  .panel{padding:22px}
  .card{padding:20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .footer-bottom{display:grid}
  .site-brand-name{font-size:14px}
  .language-full{display:none}
  .language-short{display:inline}
  .hero-platforms{flex-direction:row;max-height:none}
  pre{padding:16px}
}
@media(max-width:360px){
  .site-brand-name{max-width:150px;white-space:normal;line-height:1.2}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}