:root {
  --bg:#FFFFFF;
  --bg-panel:#F6F7F6;
  --bg-panel-2:#EEF0EE;
  --border:#E3E6E3;
  --border-strong:#CDD2CE;
  --accent:#14B24E;
  --accent-hover:#10993F;
  --accent-dark:#0B6E34;
  --hl:#D7F4E1;
  --text:#111613;
  --text-muted:#5B635E;
  --text-faint:#8A928D;
  --success:#1F9D55;
  --warn:#B9820A;
  --error:#D2412E;
  --white:#FFFFFF;
  --clear:transparent;
  --field-a:#CFEFD9;
  --field-a2:#A6D6B7;
  --field-b:#5E9B76;
  --field-c:#1B3628;
  --field-d:#0B1A13;
  --field-sheen:rgba(255,255,255,.20);
  --field-edge:rgba(255,255,255,.28);
  --showcase-a:#0E2A1F;
  --showcase-b:#081510;
  --on-dark:#FFFFFF;
  --on-dark-muted:rgba(255,255,255,.70);
  --thread-light:rgba(255,255,255,.85);
  --thread-dark:rgba(255,255,255,.36);
  --node-ring-dark:rgba(255,255,255,.55);
  --veil:rgba(11,26,19,.40);
  --shadow-btn:0 1px 0 rgba(11,26,19,.08),0 6px 16px -6px rgba(20,178,78,.45);
  --shadow-seg:0 1px 2px rgba(11,26,19,.10),0 0 0 1px rgba(11,26,19,.04);
  --shadow-win:0 1px 2px rgba(11,26,19,.06),0 10px 24px -6px rgba(11,26,19,.16),0 30px 60px -20px rgba(11,26,19,.30);
  --shadow-win-hero:0 1px 2px rgba(11,26,19,.06),0 16px 32px -8px rgba(11,26,19,.22),0 44px 80px -24px rgba(11,26,19,.42);
  --shadow-win-deep:0 1px 2px rgba(0,0,0,.20),0 16px 34px -8px rgba(0,0,0,.40),0 40px 70px -24px rgba(0,0,0,.55);
  --shadow-fab:0 2px 4px rgba(11,26,19,.18),0 8px 18px -4px rgba(11,26,19,.35);
  --r-ctl:6px;
  --r-inner:4px;
  --r-card:10px;
  --r-field:14px;
  --r-pill:999px;
  --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;
  --gutter:32px;
  --reading-width:1200px;
  --header-width:1280px;
  --header-height:60px;
  --section-space:80px;
  --text-size:16px;
  --small-size:13px;
  --h1-size:clamp(34px,3.4vw,48px);
  --h2-size:clamp(26px,2.6vw,36px);
  --h3-size:20px;
  --weight-display:800;
  --weight-strong:600;
  --ease:160ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
html,body{margin:0;background:var(--bg);color:var(--text)}
body{font-family:var(--font-body);font-size:var(--text-size);line-height:1.55;-webkit-font-smoothing:antialiased;overflow-x:clip}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
a{color:inherit;text-decoration:none}
a,button,input,summary{ -webkit-tap-highlight-color:var(--clear)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img,svg{max-width:100%;vertical-align:middle}
img{height:auto}
svg{flex-shrink:0}
button svg,.btn svg{width:17px;height:17px;flex-shrink:0}
:focus-visible{outline:2px solid var(--accent-dark);outline-offset:4px}
::selection{background:var(--hl);color:var(--text)}
h1,h2,h3{font-family:var(--font-display);line-height:1.2;font-weight:var(--weight-display);text-wrap:balance;letter-spacing:-.015em}
h1{font-size:var(--h1-size)}
h2{font-size:var(--h2-size);margin:0 0 24px}
h3{font-size:var(--h3-size);margin:0 0 12px}
p{margin:0 0 18px}
.keyword{white-space:nowrap}
small,.muted{color:var(--text-muted)}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere}
pre{max-width:100%;min-width:0;overflow-x:auto;padding:20px;border-radius:var(--r-ctl);background:var(--bg-panel);color:var(--text);font-family:var(--font-mono)}
pre code{overflow-wrap:normal;word-break:normal;white-space:pre}
.wrap{width:100%;max-width:calc(var(--reading-width) + var(--gutter)*2);padding-inline:var(--gutter);margin-inline:auto}
.section{padding-top:var(--section-space);padding-bottom:var(--section-space)}
.section--ruled{border-top:1px solid var(--border)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid>*{min-width:0}
.card,.panel{min-width:0;padding:28px;border:1px solid var(--border);border-radius:var(--r-card);background:var(--bg);color:var(--text)}
.panel{background:var(--bg-panel);color:var(--text)}
.prose{max-width:800px;min-width:0}
.prose h2{margin-top:52px}
.prose h3{margin-top:32px}
.prose p,.prose li{line-height:1.85}
.prose a{text-decoration:underline;text-underline-offset:4px}
.prose :is(img,figure,div){max-width:100%;min-width:0}
.prose figure{margin-inline:0}
.topbar,#site-header{position:relative;z-index:100;background:var(--bg);color:var(--text)}
.topbar__in{min-height:var(--header-height);width:100%;max-width:min(100%,calc(var(--header-width) + var(--gutter)*2));padding-inline:var(--gutter);margin-inline:auto;display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:17px;letter-spacing:-.01em;flex-shrink:0}
.brand img{width:28px;height:28px;flex-shrink:0}
.nav{display:flex;align-items:center;min-width:0;margin-left:auto}
.nav__list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:0;font-size:14px;color:var(--text-muted)}
.nav__list li{display:flex;align-items:center;flex-shrink:0}
.nav__list li+li::before{content:"·";color:var(--text-muted);margin-inline:11px;font-weight:700}
.nav__list a{display:block;padding-block:6px;white-space:nowrap}
.nav__list a:hover,.nav__list a[aria-current="page"]{color:var(--text)}
.nav__list a[aria-current="page"]{font-weight:600}
.header-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.language{position:relative}
.lang{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:6px 0 6px 22px;border:0;border-left:1px solid var(--border);background:var(--clear);color:var(--text);font-size:14px;white-space:nowrap}
.lang svg{width:16px;height:16px;color:var(--text-muted)}
.lang__short{display:none}
.lang__caret{font-size:11px}
.language-menu{position:absolute;right:0;top:100%;width:190px;padding:8px;border:1px solid var(--border);border-radius:var(--r-ctl);background:var(--bg);color:var(--text);box-shadow:var(--shadow-win);list-style:none;margin:0;z-index:4}
.language-menu a{display:flex;align-items:center;min-height:44px;padding:10px 12px;border-radius:var(--r-inner)}
.language-menu a:hover,.language-menu a[aria-current]{background:var(--bg-panel);color:var(--text)}
.menu-toggle{display:none;min-width:44px;min-height:44px;align-items:center;justify-content:center;background:var(--bg);color:var(--text);border:1px solid var(--border);border-radius:var(--r-ctl)}
.mobile-drawer{position:absolute;top:100%;left:0;right:0;z-index:3;padding:16px var(--gutter) 24px;background:var(--bg);color:var(--text);border-top:1px solid var(--border);max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain}
.mobile-drawer ul{padding:0;margin:0;list-style:none}
.mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px;border-bottom:1px solid var(--border)}
.mobile-drawer a[aria-current]{font-weight:600;background:var(--bg-panel);color:var(--text)}
.mobile-drawer__caption{margin:20px 12px 8px;font-size:13px;color:var(--text-muted)}
.menu-veil{position:fixed;inset:var(--header-height) 0 0;z-index:90;border:0;background:var(--veil);color:var(--white)}
.hero{padding-top:32px;overflow-x:clip;overflow-y:clip;padding-bottom:36px}
.badge{display:inline-flex;align-items:center;gap:8px;min-height:28px;max-width:100%;padding:3px 12px 3px 10px;border:1px solid var(--border);border-radius:var(--r-pill);font-size:13px;color:var(--text-muted);background:var(--bg);flex-wrap:wrap}
.badge b{color:var(--text);font-weight:600}
.dot{display:inline-block;width:7px;height:7px;border-radius:var(--r-pill);background:var(--accent);flex-shrink:0}
.dot--idle{background:var(--text-faint)}
.hero h1{position:relative;isolation:isolate;margin:18px 0 22px;font-size:clamp(26px,3.4vw,48px);line-height:1.15;letter-spacing:-.02em}
.line{display:block}
.hl{position:relative;display:inline-block;padding:0 .06em}
.hl::before{content:"";position:absolute;z-index:-1;left:-.14em;right:-.14em;top:.1em;bottom:-.02em;background:var(--hl);border-radius:var(--r-inner)}
.cta{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:48px;max-width:100%;padding:10px 24px;border:1px solid var(--clear);border-radius:var(--r-ctl);font-size:15px;font-weight:600;letter-spacing:.01em;text-align:center;transition:background-color var(--ease),border-color var(--ease)}
.btn--primary{background:var(--accent);color:var(--white);box-shadow:var(--shadow-btn)}
.btn--primary:hover,.btn--primary.is-hover{background:var(--accent-hover);color:var(--white)}
.btn--primary:active,.btn--primary.is-active{background:var(--accent-dark);color:var(--white)}
.btn--ghost{border-color:var(--border-strong);background:var(--bg);color:var(--text)}
.btn--ghost:hover,.btn--ghost.is-hover{border-color:var(--text)}
.btn:disabled{background:var(--bg-panel-2);color:var(--text-muted);box-shadow:none;border-color:var(--border)}
.btn.is-focus{outline:2px solid var(--accent-dark);outline-offset:4px}
.lede{margin:16px 0;max-width:640px;font-size:17px;color:var(--text-muted)}
.lede strong{color:var(--text);font-weight:600}
.platforms{display:flex;align-items:center;gap:8px;flex-wrap:wrap;padding:0;margin:0;list-style:none}
.platforms__cap{font-size:13px;color:var(--text-muted);margin-right:6px}
.chip{display:inline-flex;align-items:center;gap:7px;min-height:30px;padding:4px 13px 4px 11px;max-width:100%;border:1px solid var(--border);border-radius:var(--r-pill);font-size:13px;color:var(--text);background:var(--bg);overflow-wrap:anywhere}
.chip svg{width:14px;height:14px;flex-shrink:0}
.site-footer{border-top:1px solid var(--border);background:var(--bg);color:var(--text);padding-top:56px;padding-bottom:28px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr 1.3fr .7fr;gap:36px}
.footer-grid>*{min-width:0}
.footer-grid h2{font-size:15px;margin:0 0 18px}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin-bottom:10px}
.footer-grid a:not(.brand){font-size:14px;color:var(--text-muted)}
.footer-grid a:hover{text-decoration:underline}
.footer-brand p{margin-top:18px;font-size:14px;color:var(--text-muted)}
.copyright{margin-top:36px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.reveal{opacity:1;transform:none}
.reveal.is-waiting{opacity:0;transform:translateY(12px);transition:opacity 500ms ease,transform 500ms ease}
.reveal.shown{opacity:1;transform:none}
@media(max-width:1279px){
  .nav--desktop{display:none}
  .header-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
}
@media(min-width:1280px){.mobile-drawer,.menu-veil{display:none!important}}
@media(max-width:768px){
  :root{--gutter:24px;--section-space:56px}
  h1,.hero h1{font-size:28px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .brand{font-size:15px}
  .topbar__in>.brand{min-width:0;flex-shrink:1}
  .topbar__in>.brand span{min-width:0;overflow-wrap:anywhere}
  .topbar__in{gap:12px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .wrap{width:100%;padding-inline:var(--gutter)}
  .grid{grid-template-columns:minmax(0,1fr)}
  .brand{font-size:14px;gap:7px}
  .brand img{width:25px;height:25px}
  .lang{padding-left:10px}
  .lang__full{display:none}
  .lang__short{display:inline}
  .header-tools{margin-left:auto;gap:6px}
  .tilt,[data-tilt]{transform:none!important}
  .card,.panel{padding:20px}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .badge{font-size:12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal.is-waiting{opacity:1;transform:none}
}