:root{
  color-scheme:light;
  --bg:#F6EEE1;
  --panel:#FFFBF5;
  --panel-2:#EDE3D3;
  --line:#E2D6C3;
  --coral:#E2553A;
  --coral-dk:#B53D25;
  --brick:#7A2414;
  --ink:#2A1F17;
  --muted:#74665A;
  --cobalt:#3A5CC8;
  --leaf:#2F8A57;
  --warn:#C98A16;
  --error:#B8322B;
  --flag-navy:#2D3A78;
  --device:#241B16;
  --device-hi:#3B2E26;
  --device-lo:#140F0C;
  --clear:transparent;
  --coral-wash:rgba(226,85,58,.06);
  --coral-wash-2:rgba(226,85,58,.025);
  --coral-10:rgba(226,85,58,.10);
  --coral-12:rgba(226,85,58,.12);
  --coral-14:rgba(226,85,58,.14);
  --cobalt-12:rgba(58,92,200,.12);
  --leaf-12:rgba(47,138,87,.13);
  --ink-06:rgba(42,31,23,.06);
  --ink-12:rgba(42,31,23,.12);
  --ink-30:rgba(42,31,23,.28);
  --brick-45:rgba(122,36,20,.45);
  --track:rgba(237,227,211,.72);
  --hi-warm:rgba(255,236,214,.30);
  --hi-white:rgba(255,255,255,.9);
  --device-ring:rgba(255,236,214,.07);
  --glass:rgba(255,251,245,.16);
  --glass-line:rgba(255,251,245,.34);
  --glare:rgba(255,251,245,.24);
  --sheen:rgba(255,251,245,.07);
  --on-coral:rgba(255,251,245,.88);
  --on-dark-55:rgba(246,238,225,.55);
  --font-display:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --fs-display:64px;
  --fs-mobile-display:38px;
  --fs-h2:36px;
  --fs-h3:28px;
  --fs-body:17px;
  --fs-lede:20px;
  --fs-ui:16px;
  --fs-small:14.5px;
  --fs-caption:12px;
  --fs-micro:11px;
  --r-xs:4px;
  --r-sm:6px;
  --r-md:8px;
  --r-lg:10px;
  --r-device:18px;
  --r-pill:999px;
  --r-round:50%;
  --gutter:32px;
  --content-width:1280px;
  --head-height:64px;
  --anchor-offset:88px;
  --toc-offset:88px;
  --toc-landing:164px;
  --shadow-panel:0 24px 64px -28px var(--coral-10);
  --ease:150ms 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;background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:var(--fs-body);line-height:1.7;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
h1,h2,h3,h4,p,figure{margin-top:0}
h1,h2,h3,h4{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--fs-display);line-height:1.12;letter-spacing:-.02em;font-weight:800}
h2{font-size:var(--fs-h2);line-height:1.25;letter-spacing:-.02em;font-weight:800}
h3{font-size:var(--fs-h3);line-height:1.35;font-weight:700}
p{margin-bottom:1.2em}
a{color:inherit;text-underline-offset:4px}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0;vertical-align:middle}
ul{margin:0;padding:0;list-style:none}
ol{padding-left:1.5em}
li+li{margin-top:0}
code{font-family:var(--font-mono);overflow-wrap:anywhere;font-size:.88em;background:var(--panel-2);border-radius:var(--r-xs);padding:.12em .3em}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--panel-2);border:1px solid var(--line);border-radius:var(--r-md)}
pre code{padding:0;white-space:pre;overflow-wrap:normal;background:var(--clear)}
[hidden]{display:none!important}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--cobalt);outline-offset:4px}
:where(main,section,article,aside,nav,header,footer,div){min-width:0}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:72px}
.reading-wrap{max-width:900px}
.prose{overflow-wrap:break-word}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.6em}
.prose ul{padding-left:1.3em;list-style:disc}
.prose li+li{margin-top:.5em}
.prose a{color:var(--coral-dk)}
.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}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.muted{color:var(--muted)}
.kw,.ic-coral{color:var(--coral)}
.ic-cobalt{color:var(--cobalt)}
.ic-leaf{color:var(--leaf)}
.panel,.card{border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);box-shadow:var(--shadow-panel)}
.card{padding:24px}
.btn,.btn-primary,.btn-secondary,.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:44px;padding:10px 22px;border:1px solid var(--clear);border-radius:var(--r-sm);font-size:var(--fs-ui);font-weight:600;line-height:24px;text-decoration:none;white-space:nowrap;flex-shrink:0;transition:background-color var(--ease),color var(--ease),border-color var(--ease)}
.btn-primary{height:46px;padding:0 22px;background:var(--ink);color:var(--panel);box-shadow:0 12px 26px -12px var(--ink-30),inset 0 1px 0 var(--hi-warm)}
.btn-primary svg{color:var(--coral)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--coral-dk)}
.btn-primary:hover svg{color:var(--panel)}
.btn-secondary{background:var(--panel);border-color:var(--line);color:var(--ink)}
.btn-secondary:hover{background:var(--panel-2)}
.btn:disabled,.btn-primary:disabled{background:var(--panel-2);color:var(--muted);box-shadow:none}
.btn-login{height:38px;min-height:38px;padding:0 18px;background:var(--panel);border-color:var(--ink);font-size:var(--fs-small)}
.btn-login:hover{background:var(--ink);color:var(--panel)}
.link-under{display:inline-block;min-height:24px;font-size:var(--fs-ui);font-weight:600;text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:6px;line-height:46px}
.link-under:hover{color:var(--coral-dk)}
.announce{background:var(--ink);color:var(--bg);font-family:var(--font-mono);font-size:var(--fs-caption);letter-spacing:.08em;text-transform:uppercase}
.announce .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:36px}
.announce-msg{display:flex;align-items:center;gap:10px;margin:0;line-height:1.4}
.announce-msg svg{color:var(--coral)}
.announce-link{display:inline-flex;align-items:center;min-height:24px;color:var(--bg);text-decoration-color:var(--on-dark-55);text-decoration-thickness:1px;white-space:nowrap;line-height:1.4}
.announce-link:hover{text-decoration-color:var(--coral)}
.stage{position:relative;background:linear-gradient(180deg,var(--coral-wash) 0%,var(--coral-wash-2) 40%,var(--clear) 80%);overflow-x:clip;max-width:100%}
.decor-zone{position:relative;overflow-x:clip;max-width:100%}
.site-head,#site-header{position:relative;z-index:50}
.head-row{display:flex;align-items:center;gap:24px;min-height:var(--head-height);position:relative;z-index:53}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0}
.brand-mark{display:block;flex:none}
.brand-en{font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.02em;line-height:1}
.brand-zh{font-size:var(--fs-small);font-weight:500;color:var(--muted);padding-left:10px;border-left:1px solid var(--line)}
.nav{display:flex;justify-content:center;flex:1;min-width:0}
.nav-track{display:flex;align-items:center;list-style:none;margin:0;padding:4px;gap:2px;border-radius:var(--r-pill);background:var(--track);box-shadow:inset 0 0 0 1px var(--line)}
.nav-track a{display:flex;align-items:center;justify-content:center;padding:6px 13px;border-radius:var(--r-pill);font-size:var(--fs-small);line-height:22px;font-weight:500;color:var(--muted);text-decoration:none;white-space:nowrap}
.nav-track a:hover{color:var(--ink)}
.nav-track a.is-active{background:var(--panel);color:var(--ink);font-weight:600;box-shadow:0 0 0 1px var(--line),0 2px 6px var(--ink-06)}
.head-tools{display:flex;align-items:center;gap:18px;flex-shrink:0}
.lang-switch{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;min-width:24px;width:auto;padding:0;border:0;background:var(--clear);font-size:var(--fs-small);line-height:22px;color:var(--muted);white-space:nowrap}
.lang span{white-space:nowrap}
.lang:hover{color:var(--ink)}
.lang-panel{display:none;position:absolute;right:0;top:calc(100% + 8px);z-index:60;width:180px;padding:6px;border:1px solid var(--line);border-radius:var(--r-md);background:var(--panel);box-shadow:var(--shadow-panel)}
.lang-switch.is-open .lang-panel{display:block}
.lang-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;text-decoration:none;border-radius:var(--r-xs);font-size:var(--fs-small)}
.lang-panel a:hover,.lang-panel a[aria-current]{background:var(--panel-2)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;border:1px solid var(--line);border-radius:var(--r-sm);background:var(--panel)}
.menu-line{display:block;width:20px;height:2px;background:currentColor}
.nav-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}
.hero{padding-top:28px;padding-bottom:0;text-align:center}
.hero-copy{position:relative;z-index:2}
.eyebrow{display:inline-flex;align-items:center;gap:8px;min-height:26px;padding:4px 12px;margin:0 0 14px;border:1px solid var(--line);border-radius:var(--r-pill);background:var(--panel);font-family:var(--font-mono);font-size:var(--fs-micro);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);line-height:1.4}
.eyebrow-dot{flex:none;width:6px;height:6px;border-radius:var(--r-round);background:var(--coral);box-shadow:0 0 0 3px var(--coral-12)}
.hero h1{margin:0 0 12px;font-size:var(--fs-display);line-height:1.1;font-weight:800;letter-spacing:-.02em}
.lede{max-width:860px;margin:0 auto 20px;font-size:var(--fs-lede);line-height:32px;color:var(--muted)}
.lede strong{color:var(--ink);font-weight:600}
.cta-row{display:flex;align-items:center;justify-content:center;gap:26px;margin:0 0 18px}
.mk{flex:none;display:inline-block;width:9px;height:9px}
.mk-tri{background:var(--coral);clip-path:polygon(50% 0,100% 100%,0 100%)}
.mk-dot{background:var(--cobalt);border-radius:var(--r-round)}
.mk-sq{width:8px;height:8px;border-radius:var(--r-xs);background:var(--leaf)}
.trust{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 22px;margin:0 0 12px;font-size:15px;line-height:24px}
.trust li{display:inline-flex;align-items:center;gap:8px}
.proof{display:grid;grid-template-columns:max-content max-content;justify-content:center;align-items:center;gap:8px 16px;margin:0;text-align:left}
.proof-label{font-family:var(--font-mono);font-size:var(--fs-micro);letter-spacing:.1em;text-transform:uppercase;color:var(--muted);text-align:right;line-height:24px;margin:0}
.proof-list{display:flex;flex-wrap:wrap;gap:4px 18px;margin:0}
.proof-list li{display:inline-flex;align-items:center;gap:7px;font-size:14px;line-height:24px;color:var(--muted)}
.ico{display:block;flex:none;width:20px;height:20px;color:var(--ink)}
.flag{display:block;flex:none;width:24px;height:16px;border-radius:var(--r-xs);overflow:hidden}
.fl-w{fill:var(--panel)}
.fl-r{fill:var(--error)}
.fl-b{fill:var(--flag-navy)}
.fl-k{fill:var(--ink)}
.fl-g{fill:var(--warn)}
.fl-edge{fill:none;stroke:var(--ink-12);stroke-width:1}
.fl-cut{clip-path:url(#uy-flag-clip)}
.stroke-icon{fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.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:block;min-height:120px;max-width:100%;overflow:hidden;margin-block:24px}
#server-status+*{margin-top:32px}
.site-footer{padding-top:56px;padding-bottom:28px;background:var(--panel-2);border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px}
.footer-intro{max-width:350px;margin-top:18px;font-size:var(--fs-small);color:var(--muted)}
.footer-title{font-size:var(--fs-ui);font-weight:700;margin:0 0 16px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 16px}
.footer-links a,.footer-languages a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;font-size:var(--fs-small);text-decoration:none}
.footer-links a:hover,.footer-languages a:hover,.footer-legal a:hover{color:var(--coral-dk);text-decoration:underline}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 24px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-top:24px;font-size:var(--fs-small);color:var(--muted)}
.footer-bottom p{margin:0}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
@media(max-width:1240px) and (min-width:769px){
  .head-row{flex-wrap:wrap;gap:8px 24px;padding-block:10px}
  .nav{order:3;flex-basis:100%;justify-content:flex-start;overflow-x:auto;padding:2px}
  .head-tools{margin-left:auto}
}
@media(max-width:768px){
  :root{--gutter:20px;--fs-h2:28px;--fs-h3:24px;--anchor-offset:80px;--toc-offset:12px;--toc-landing:100px}
  .head-row{flex-wrap:nowrap;gap:10px;min-height:var(--head-height)}
  .nav{display:none}
  .head-tools{margin-left:auto;gap:8px}
  .menu-toggle{display:inline-flex}
  .brand-zh{display:none}
  .lang span{display:none}
  .lang{min-width:28px}
  .btn-login{padding-inline:12px}
  .nav-drawer{position:fixed;z-index:52;top:var(--drawer-top,var(--head-height));left:0;right:0;height:calc(100dvh - var(--drawer-top,var(--head-height)));max-height:calc(100dvh - var(--drawer-top,var(--head-height)));padding:16px var(--gutter) 32px;overflow-y:auto;overscroll-behavior:contain;background:var(--panel);border-top:1px solid var(--line)}
  .nav-drawer.is-open{display:block}
  .nav-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:10px 14px;text-decoration:none;border-radius:var(--r-sm)}
  .nav-drawer a:hover,.nav-drawer a.is-active{background:var(--panel-2)}
  .drawer-languages{padding-top:16px;margin-top:16px;border-top:1px solid var(--line)}
  .nav-veil{position:fixed;z-index:51;inset:var(--drawer-top,var(--head-height)) 0 0;background:var(--ink-30);border:0}
  .nav-veil.is-open{display:block}
  .hero{padding-top:24px}
  h1,.hero h1{font-size:var(--fs-mobile-display);line-height:1.18}
  .lede{font-size:var(--fs-body);line-height:28px}
  .cta-row{flex-wrap:wrap;gap:12px 22px}
  .trust{gap:6px 16px;font-size:14px}
  .proof{grid-template-columns:1fr;row-gap:4px}
  .proof-label{text-align:center}
  .proof-list{justify-content:center;margin-bottom:8px}
  .section{padding-top:48px;padding-bottom:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none!important}
  .decor-zone,.stage,[data-parallax-decor]{max-width:100%}
  .announce{font-size:var(--fs-micro)}
  .announce .wrap{padding-top:7px;padding-bottom:7px}
}
@media(max-width:360px){
  :root{--gutter:16px;--fs-mobile-display:34px}
  .brand{gap:6px}
  .brand-en{font-size:var(--fs-body)}
  .brand-mark{width:28px;height:28px}
  .head-tools{gap:4px}
  .btn-login{padding-inline:9px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}