:root {
  --bg:#F6EFE2;
  --bg-top:#FBF6EC;
  --bg-bottom:#F1E8D8;
  --panel:#FCF8F0;
  --panel-2:#EFE5D3;
  --paper-white:#FFFDF9;
  --border:#E2D6C2;
  --border-strong:#CFC0A8;
  --accent:#245A6B;
  --accent-2:#2E6E7E;
  --accent-dark:#173F4C;
  --accent-tint:#E1ECEA;
  --accent-tint-edge:#CEDEDB;
  --ochre:#A8621B;
  --ochre-tint:rgba(168,98,27,.17);
  --ink:#2A2118;
  --ink-soft:#3B3026;
  --muted:#6E6152;
  --wall:#8A7D6C;
  --success:#2F7A4A;
  --warn:#B7791F;
  --error:#B23A2E;
  --on-accent:#FFFFFF;
  --on-accent-2:rgba(255,255,255,.80);
  --on-accent-3:rgba(255,255,255,.60);
  --glass:rgba(255,255,255,.14);
  --glass-row:rgba(255,255,255,.08);
  --glass-chip:rgba(255,255,255,.17);
  --glass-edge:rgba(255,255,255,.30);
  --glass-edge-soft:rgba(255,255,255,.18);
  --glass-hi:rgba(255,255,255,.22);
  --glass-sheen:rgba(255,255,255,.16);
  --glass-dark:rgba(23,63,76,.64);
  --slab-1:rgba(206,232,236,.20);
  --slab-2:rgba(16,46,56,.42);
  --drop:rgba(9,32,40,.34);
  --halo:rgba(36,90,107,.12);
  --halo-soft:rgba(36,90,107,.06);
  --halo-float:rgba(36,90,107,.24);
  --warm-glow:rgba(255,228,190,.22);
  --ink-shadow:rgba(42,33,24,.42);
  --ink-hi:rgba(255,255,255,.14);
  --ring-paper:rgba(252,248,240,.72);
  --head-bg:rgba(251,246,236,.92);
  --veil:rgba(42,33,24,.42);
  --flag-r:#B9473C;
  --flag-w:#FFFDF8;
  --flag-b:#34497A;
  --flag-k:#2A2118;
  --flag-g:#D3A03A;
  --flag-edge:rgba(42,33,24,.16);
  --gflag-strong:rgba(255,255,255,.92);
  --gflag-soft:rgba(255,255,255,.30);
  --gflag-mid:rgba(255,255,255,.60);
  --gflag-deep:rgba(23,63,76,.85);
  --gflag-edge:rgba(255,255,255,.34);
  --clear:transparent;
  --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;
  --r-dot:2px;
  --r-round:50%;
  --r-xs:6px;
  --r-sm:8px;
  --r-md:12px;
  --r-lg:16px;
  --r-xl:24px;
  --r-pill:999px;
  --wrap:1200px;
  --wrap-wide:1280px;
  --reading:800px;
  --gutter:32px;
  --head-height:64px;
  --anchor-offset:84px;
  --toc-offset:136px;
  --space-section:88px;
  --ease:cubic-bezier(.2,.65,.3,1);
  --fast:.2s;
  --reveal-time:.35s;
  --paper-grain-opacity:.03;
  --grain-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Cpath fill='%232A2118' filter='url(%23p)' d='M0 0h160v160H0z'/%3E%3C/svg%3E");
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
body{margin:0;min-height:100vh;font-family:var(--font-body);font-size:16px;line-height:1.65;color:var(--ink);background:linear-gradient(180deg,var(--bg-top) 0,var(--bg) 520px,var(--bg-bottom) 900px,var(--bg) 1400px);background-color:var(--bg);-webkit-font-smoothing:antialiased}
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;background-image:var(--grain-image);opacity:var(--paper-grain-opacity)}
main{position:relative;z-index:1}
img,svg{vertical-align:middle;max-width:100%}
img{height:auto}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
a{color:inherit;text-underline-offset:.2em}
button,a,input,select,textarea,summary{touch-action:manipulation}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
button:disabled,.btn[aria-disabled="true"]{cursor:not-allowed;opacity:.55;transform:none}
[hidden]{display:none!important}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:400;color:var(--ink);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.45vw,64px);line-height:1.12;letter-spacing:-.02em;margin:0 0 24px}
h2{font-size:clamp(28px,3.2vw,42px);line-height:1.25;letter-spacing:-.02em;margin:0 0 24px}
h3{font-size:22px;line-height:1.4;letter-spacing:-.01em;margin:0 0 12px}
h4{font-size:18px;line-height:1.5;margin:0 0 12px}
p{margin:0 0 20px}
ul,ol{padding-inline-start:24px}
li+li{margin-top:6px}
hr{border:0;border-top:1px solid var(--border);margin-block:32px}
code,kbd,pre,.mono{font-family:var(--font-mono)}
code{font-size:.9em;overflow-wrap:anywhere;padding:2px 5px;background:var(--panel-2);border-radius:var(--r-xs)}
pre{max-width:100%;overflow-x:auto;padding:24px;background:var(--panel-2);border:1px solid var(--border);border-radius:var(--r-sm);line-height:1.7}
pre code{padding:0;background:var(--clear);overflow-wrap:normal;white-space:pre}
blockquote{margin-inline:0}
:where(.grid,.card-grid,.pricing-grid,.platform-grid,.footer-grid,.feature-browser)>*{min-width:0}
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-wide{width:100%;max-width:var(--wrap-wide);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:var(--space-section);padding-bottom:var(--space-section)}
.section-compact{padding-top:40px;padding-bottom:40px}
.section-head{max-width:800px;margin-bottom:36px}
.section-head p,.muted{color:var(--muted)}
.no-break{white-space:nowrap}
.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{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-md);padding:28px;box-shadow:inset 0 1px 0 var(--paper-white),0 18px 48px -32px var(--halo)}
.panel-sunk{background:var(--panel-2)}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.grid{display:grid;gap:24px}
.prose{overflow-wrap:break-word;min-width:0}
.prose p,.prose li{line-height:1.9}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose a:not(.btn){color:var(--accent)}
.prose img{border-radius:var(--r-sm)}
.decor-section,.hero,.tilt-stage{position:relative;overflow-x:clip;max-width:100%}
.decor-halo{position:absolute;inset:10% 10% 0;max-width:100%;pointer-events:none;background:radial-gradient(ellipse,var(--halo),var(--clear) 70%)}
.counter-value,[data-counter]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:end}
#server-status{position:relative;display:block;min-width:0;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:32px}
.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}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:24px;height:44px;padding:0 22px;border:1px solid var(--clear);border-radius:var(--r-sm);font-family:var(--font-body);font-size:15px;font-weight:500;line-height:1.4;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:background-color var(--fast) ease,box-shadow var(--fast) ease,transform var(--fast) ease,border-color var(--fast) ease}
.btn-solid,.btn-primary{background:var(--ink);color:var(--panel);box-shadow:inset 0 1px 0 var(--ink-hi),0 10px 22px -12px var(--ink-shadow)}
.btn-solid:hover,.btn-primary:hover,.btn-demo-hover{background:var(--ink-soft);transform:translateY(-1px)}
.btn-line,.btn-secondary{background:var(--paper-white);color:var(--ink);border-color:var(--border-strong)}
.btn-line:hover,.btn-secondary:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-sm{height:36px;padding:0 16px;font-size:14px}
.btn-demo-focus{outline:2px solid var(--accent);outline-offset:3px}
.text-link{display:inline-flex;align-items:center;gap:6px;min-height:24px;color:var(--accent);text-decoration:none}
.text-link:hover{text-decoration:underline}
.arrow{color:var(--ochre);display:inline-block;transition:transform var(--fast) ease}
a:hover .arrow{transform:translateX(3px)}
.announce{position:relative;z-index:41;display:flex;align-items:center;justify-content:center;gap:12px;min-height:36px;padding:6px 16px;background:var(--accent-tint);border-bottom:1px solid var(--accent-tint-edge);font-size:13.5px;line-height:1.5;color:var(--ink-soft);text-align:center}
.announce-link{display:inline-flex;align-items:center;gap:4px;min-height:24px;color:var(--accent);font-weight:500;text-decoration:none;white-space:nowrap}
.announce-link:hover{text-decoration:underline}
#site-header{position:sticky;top:0;z-index:60}
.site-head{position:sticky;top:0;z-index:60;background:var(--head-bg);box-shadow:0 1px 0 var(--border)}
#site-header .site-head{position:relative}
.head-in{max-width:var(--wrap-wide);margin:0 auto;padding:0 32px;height:var(--head-height);display:flex;align-items:center;gap:28px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex:none;min-height:32px}
.brand-mark{width:30px;height:30px;display:block;flex-shrink:0}
.brand-word{font-family:var(--font-display);font-size:18px;font-weight:600;letter-spacing:-.015em;color:var(--ink);white-space:nowrap}
.brand-zh{font-size:14px;font-weight:400;color:var(--muted)}
.nav{flex:1;min-width:0}
.nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.nav li{margin:0;flex-shrink:0}
.nav a{display:inline-flex;align-items:center;height:34px;padding:0 11px;border-radius:var(--r-pill);font-size:14.5px;line-height:1.5;color:var(--muted);text-decoration:none;white-space:nowrap;transition:color var(--fast) ease,background-color var(--fast) ease}
.nav a:hover{color:var(--ink)}
.nav a[aria-current="page"]{background:var(--panel-2);color:var(--ink);font-weight:500;box-shadow:inset 0 0 0 1px var(--border)}
.head-actions{display:flex;align-items:center;gap:10px;flex-shrink:0;margin-left:auto}
.language{position:relative;flex-shrink:0}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 10px;border:0;background:var(--clear);border-radius:var(--r-sm);font:inherit;font-size:14px;color:var(--muted);cursor:pointer;white-space:nowrap}
.lang:hover{color:var(--ink);background:var(--panel-2)}
.lang svg{width:16px;height:16px;flex-shrink:0}
.lang-label{white-space:nowrap}
.caret{font-size:11px;flex-shrink:0}
.lang-panel{position:absolute;right:0;top:calc(100% + 10px);z-index:90;min-width:180px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-sm);box-shadow:0 20px 45px -18px var(--halo-float)}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-xs);text-decoration:none;color:var(--ink)}
.lang-panel a:hover,.lang-panel a[aria-current="true"]{background:var(--panel-2)}
.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-sm);background:var(--panel);color:var(--ink)}
.menu-line{display:block;width:20px;height:2px;background:currentColor;flex-shrink:0}
.menu-toggle[aria-expanded="true"] .menu-line:first-child{transform:translateY(7px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .menu-line:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .menu-line:last-child{transform:translateY(-7px) rotate(-45deg)}
.nav-drawer{position:fixed;top:var(--head-height);right:0;bottom:0;z-index:70;width:min(420px,100%);height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);padding:20px var(--gutter) 40px;border-left:1px solid var(--border)}
.nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 14px;text-decoration:none;color:var(--ink);border-radius:var(--r-sm)}
.nav-drawer a:hover,.nav-drawer a[aria-current="page"]{background:var(--panel-2)}
.drawer-languages{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}
.nav-veil{position:fixed;inset:var(--head-height) 0 0;z-index:65;background:var(--veil);border:0;width:100%;cursor:pointer}
html.nav-open{overflow:hidden}
.site-footer{position:relative;z-index:1;margin-top:64px;padding-top:56px;padding-bottom:24px;background:var(--panel-2);border-top:1px solid var(--border);box-shadow:inset 0 1px 0 var(--paper-white)}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr;gap:48px}
.footer-brand p{max-width:330px;margin-top:20px;font-size:14px;color:var(--muted)}
.footer-title{font-size:15px;font-weight:500;margin-bottom:16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 20px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:32px;text-decoration:none;font-size:14px;color:var(--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 24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px 24px;margin-top:24px;font-size:13px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:8px 20px}
@media(min-width:1025px) and (max-width:1279px){
  .head-in{gap:18px;padding-inline:24px}
  .nav a{padding-inline:8px;font-size:13px}
  .head-actions{gap:6px}
  .head-cta{display:none}
}
@media(max-width:1024px){
  .nav{display:none}
  .head-in{justify-content:space-between;gap:16px}
  .head-actions{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .head-cta{display:none}
}
@media(min-width:1025px){
  .nav-drawer,.nav-veil{display:none}
}
@media(max-width:768px){
  :root{--gutter:20px;--space-section:56px}
  h1{font-size:clamp(28px,8.4vw,40px)}
  h2{font-size:clamp(26px,6vw,34px)}
  .head-in{padding-inline:20px}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .panel,.card{padding:22px}
  .lang-label{display:none}
  .lang{padding-inline:8px}
  .decor-halo{max-width:100%}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,.tilt-card,[data-tilt]{transform:none}
  .footer-grid{grid-template-columns:1fr}
  .footer-brand{grid-column:auto}
  .announce{flex-wrap:wrap;gap:0 10px;font-size:12px}
}
@media(max-width:380px){
  :root{--gutter:16px}
  .head-in{padding-inline:16px;gap:8px}
  .brand{gap:6px}
  .brand-word{font-size:16px}
  .brand-mark{width:26px;height:26px}
  .head-actions{gap:4px}
  .head-login{padding-inline:10px}
  .lang{min-width:32px;padding-inline:4px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}