:root {
  color-scheme: light;
  --bg:#FBF5EB;
  --bg-panel:#FFFCF6;
  --bg-panel-2:#F3EADB;
  --border:#E6D9C4;
  --border-soft:rgba(230,217,196,.72);
  --border-strong:#D8C6AB;
  --accent:#4F27E8;
  --accent-dark:#3417A8;
  --text:#2A1F17;
  --text-muted:#6E5F50;
  --success:#1F8A5B;
  --warn:#C9821A;
  --error:#C2412D;
  --hero-top:#FEFAF3;
  --hero-bottom:#F5ECDD;
  --chrome-bottom:#F8F0E4;
  --white:#FFFFFF;
  --clear:transparent;
  --ribbon-orange:#FF9A3D;
  --ribbon-pink:#F45FB0;
  --ribbon-violet:#4F27E8;
  --accent-06:rgba(79,39,232,.06);
  --accent-10:rgba(79,39,232,.10);
  --accent-20:rgba(79,39,232,.20);
  --accent-30:rgba(79,39,232,.30);
  --muted-35:rgba(110,95,80,.35);
  --ink-06:rgba(42,31,23,.06);
  --veil:rgba(42,31,23,.28);
  --hl:rgba(255,255,255,.72);
  --hl-edge:rgba(255,255,255,.95);
  --glow-orange:rgba(255,154,61,.16);
  --glow-pink:rgba(244,95,176,.14);
  --glow-violet:rgba(79,39,232,.12);
  --glow-orange-soft:rgba(255,154,61,.08);
  --glow-pink-soft:rgba(244,95,176,.07);
  --wave-hot:linear-gradient(180deg,var(--ribbon-orange),var(--ribbon-pink) 50%,var(--ribbon-violet));
  --wave-soft:linear-gradient(180deg,rgba(244,95,176,.55),rgba(79,39,232,.42));
  --grad-ribbon:linear-gradient(90deg,var(--ribbon-orange),var(--ribbon-pink) 50%,var(--ribbon-violet));
  --shadow-soft:inset 0 1px 0 var(--hl-edge),0 1px 2px rgba(79,39,232,.06);
  --shadow-card:inset 0 1px 0 var(--hl-edge),0 24px 60px -28px rgba(79,39,232,.10);
  --shadow-hover:inset 0 1px 0 var(--hl-edge),0 28px 64px -24px rgba(79,39,232,.20);
  --shadow-win:0 0 0 1px var(--border),0 2px 6px rgba(79,39,232,.05),0 40px 90px -24px rgba(79,39,232,.12),0 18px 40px -22px rgba(79,39,232,.12);
  --shadow-float:0 0 0 1px var(--border),0 28px 60px -18px rgba(79,39,232,.20),0 8px 18px -10px rgba(52,23,168,.10);
  --shadow-btn:inset 0 1px 0 rgba(255,255,255,.18),0 12px 24px -12px rgba(79,39,232,.55);
  --r-sm:8px;
  --r-md:10px;
  --r-bar:3px;
  --r-round:50%;
  --flag-white:#FFFFFF;
  --flag-jp:#BC002D;
  --flag-hk:#DE2910;
  --flag-sg:#EE2536;
  --flag-us-red:#B22234;
  --flag-us-blue:#3C3B6E;
  --flag-it-green:#009246;
  --flag-it-red:#CE2B37;
  --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;
  --fs-xs:12px;
  --fs-sm:14px;
  --fs-body:16px;
  --fs-lead:17px;
  --fs-h3:24px;
  --fs-h2:36px;
  --fs-display:66px;
  --weight-normal:400;
  --weight-medium:500;
  --weight-bold:600;
  --gutter:64px;
  --page-max:1440px;
  --head-height:72px;
  --anchor-offset:88px;
  --toc-offset:88px;
  --toc-landing:160px;
  --ease: cubic-bezier(.2,.65,.3,1);
}

*,*::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(--text);font-family:var(--font-body);font-size:var(--fs-body);line-height:1.65;-webkit-font-smoothing:antialiased}
html.nav-open{overflow:hidden}
[hidden]{display:none!important}
a{color:var(--accent);text-underline-offset:4px}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button,a,summary{-webkit-tap-highlight-color:var(--accent-10)}
button{color:inherit}
button:disabled,.btn[aria-disabled="true"]{cursor:not-allowed;opacity:.55}
:where(a,button,summary,input,textarea,select,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:4px}
img,svg{vertical-align:middle}
img{max-width:100%;height:auto}
svg{flex-shrink:0}
h1,h2,h3,h4{font-family:var(--font-display);font-weight:var(--weight-normal);line-height:1.2;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.6vw,72px);letter-spacing:-.02em}
h2{font-size:var(--fs-h2);letter-spacing:-.02em}
h3{font-size:var(--fs-h3)}
p{margin:0 0 1.25em}
strong,b{font-weight:var(--weight-bold)}
ul,ol{padding-left:1.5em}
code{font-family:var(--font-mono);overflow-wrap:anywhere;font-size:.9em}
pre{max-width:100%;overflow-x:auto;padding:24px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel-2)}
pre code{overflow-wrap:normal;white-space:pre;font-size:var(--fs-sm)}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
.wrap{width:100%;max-width:var(--page-max);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:80px;padding-bottom:80px}
.section-head{max-width:800px;margin-bottom:32px}
.section-head h2{margin:8px 0 16px}
.kicker{font-family:var(--font-mono);font-size:var(--fs-xs);letter-spacing:.04em;color:var(--text-muted)}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.no-break{white-space:nowrap}
:where(.grid,.hero-grid,.head-row,.footer-grid)>*{min-width:0}
.grid{display:grid;gap:24px}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-five{grid-template-columns:repeat(5,minmax(0,1fr))}
.stack{display:grid;gap:24px}
.reading{max-width:960px}
.prose{line-height:1.85;min-width:0}
.prose h2{margin-top:2em}
.prose h3{margin-top:1.7em}
.prose li+li{margin-top:8px}
.prose img{border-radius:var(--r-sm)}
.panel,.card{position:relative;min-width:0;padding:28px;border:1px solid var(--border);border-radius:var(--r-md);background:var(--bg-panel);box-shadow:var(--shadow-card)}
.panel-inset{padding:20px;border-radius:var(--r-sm);background:var(--bg-panel-2);box-shadow:inset 0 1px 2px var(--ink-06)}
.decorated{position:relative;isolation:isolate;overflow-x:clip}
.decorated::after{content:"";position:absolute;inset:45% 0 0 35%;z-index:-1;pointer-events:none;background:radial-gradient(ellipse at bottom right,var(--glow-pink-soft),var(--clear) 70%),radial-gradient(ellipse at bottom,var(--glow-orange-soft),var(--clear) 70%)}
#server-status{position:relative;display:block;min-width:0;min-height:120px;overflow:hidden;margin-block:32px}
#server-status+*{margin-top:32px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 22px;border:0;border-radius:var(--r-sm);font-size:var(--fs-body);font-weight:var(--weight-medium);line-height:1.5;text-decoration:none;transition:transform .15s,background-color .15s,box-shadow .15s;flex-shrink:0;white-space:nowrap}
.btn svg{width:16px;height:16px}
.btn-primary{background:var(--accent);color:var(--white);box-shadow:var(--shadow-btn)}
.btn-primary:hover,.btn-primary.is-hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-ghost,.btn-secondary{background:var(--bg-panel);color:var(--accent);box-shadow:0 0 0 1px var(--accent-20),var(--shadow-soft)}
.btn-ghost{padding-left:14px}
.btn-ghost:hover,.btn-secondary:hover{box-shadow:0 0 0 1px var(--accent-30),var(--shadow-soft);transform:translateY(-1px)}
.btn.is-focus{outline:2px solid var(--accent);outline-offset:4px}
.play{display:grid;place-items:center;width:22px;height:22px;border-radius:var(--r-round);background:var(--accent-10);flex-shrink:0}
.play svg{width:10px;height:10px}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}
.badge,.chip,.tag{display:inline-flex;align-items:center;gap:8px;min-height:28px;max-width:100%;padding:4px 10px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);font-size:var(--fs-xs);line-height:1.5;color:var(--text);overflow-wrap:anywhere}
.tag{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.badge{gap:10px;min-height:32px;padding:4px 12px;box-shadow:var(--shadow-soft);font-size:13px}
.badge-dot{width:8px;height:8px;flex-shrink:0;border-radius:var(--r-round);background:var(--accent);box-shadow:0 0 0 3px var(--accent-10)}
.badge-sep{width:1px;height:14px;background:var(--border);flex-shrink:0}
.badge a{display:inline-flex;align-items:center;min-height:24px;color:var(--accent);text-decoration:none}
.badge a svg{width:14px;height:14px}

.site-head,#site-header{position:relative;z-index:40}
.site-head{border-bottom:1px solid var(--border-soft)}
.head-row{display:flex;align-items:center;flex-wrap:nowrap;height:var(--head-height)}
.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--text);font-size:18px;font-weight:var(--weight-bold);letter-spacing:-.01em;flex-shrink:0;white-space:nowrap}
.brand img{width:32px;height:32px;flex-shrink:0}
.brand-zh{font-weight:var(--weight-normal);color:var(--text-muted)}
.main-nav{flex:1;min-width:0;margin-left:56px}
.main-nav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:32px}
.main-nav a{display:block;padding:8px 0;font-size:15px;font-weight:var(--weight-normal);color:var(--text-muted);text-decoration:none;white-space:nowrap}
.main-nav a:hover{color:var(--text)}
.main-nav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-bold)}
.head-tools{display:flex;align-items:center;gap:20px;margin-left:auto;flex-shrink:0}
.lang-box{position:relative}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;width:auto;min-width:24px;min-height:32px;padding:6px 0;border:0;background:var(--clear);font-size:var(--fs-sm);color:var(--text-muted)}
.lang span{white-space:nowrap}
.lang svg{width:16px;height:16px}
.lang-menu{position:absolute;right:0;top:calc(100% + 12px);z-index:60;min-width:172px;padding:8px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--bg-panel);box-shadow:var(--shadow-float)}
.lang-menu a{display:flex;align-items:center;min-height:40px;padding:8px 12px;color:var(--text-muted);text-decoration:none;border-radius:var(--r-sm)}
.lang-menu a:hover,.lang-menu a[aria-current="true"]{background:var(--accent-10);color:var(--accent)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;padding:6px 18px;border-radius:var(--r-sm);background:var(--bg-panel);color:var(--accent);font-size:var(--fs-sm);font-weight:var(--weight-medium);text-decoration:none;white-space:nowrap;box-shadow:0 0 0 1px var(--border),var(--shadow-soft)}
.btn-login:hover{box-shadow:0 0 0 1px var(--accent-30),var(--shadow-soft)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;padding:10px;border:0;border-radius:var(--r-sm);color:var(--text);background:var(--bg-panel)}
.menu-toggle svg{width:22px;height:22px}
.menu-drawer{position:fixed;top:var(--head-height);right:0;left:0;z-index:42;height:calc(100dvh - var(--head-height));max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:20px var(--gutter) 32px;background:var(--bg-panel)}
.menu-drawer a{display:flex;align-items:center;width:100%;min-height:48px;padding:12px 16px;border-bottom:1px solid var(--border);color:var(--text);text-decoration:none}
.menu-drawer a[aria-current]{color:var(--accent);font-weight:var(--weight-bold)}
.drawer-languages{margin-top:24px;border-top:1px solid var(--border)}
.menu-veil{position:fixed;inset:var(--head-height) 0 0;z-index:41;border:0;background:var(--veil)}
.site-footer{border-top:1px solid var(--border);background:var(--bg-panel-2);padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{max-width:340px;margin-top:20px;color:var(--text-muted);font-size:var(--fs-sm)}
.footer-title{margin:0 0 16px;font-size:var(--fs-sm);font-weight:var(--weight-bold)}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:6px}
.footer-links a,.footer-legal a{display:inline-flex;align-items:center;min-height:28px;color:var(--text-muted);font-size:var(--fs-sm);text-decoration:none}
.footer-links a:hover,.footer-legal a:hover{color:var(--accent)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-top:40px;padding-top:24px;border-top:1px solid var(--border);font-size:var(--fs-xs);color:var(--text-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:16px}
.reveal{transition:opacity .35s var(--ease),transform .35s var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}

@media(max-width:1240px){
  :root{--gutter:40px}
  .main-nav{margin-left:36px}
  .main-nav ul{gap:22px}
}
@media(max-width:1100px){
  .main-nav{margin-left:24px}
  .main-nav ul{gap:16px}
  .main-nav a{font-size:var(--fs-sm)}
  .head-tools{gap:14px}
}
@media(max-width:1000px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .head-tools{margin-left:auto}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-five{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(min-width:1001px){.menu-drawer,.menu-veil{display:none!important}}
@media(max-width:768px){
  :root{--gutter:20px;--head-height:60px;--anchor-offset:76px;--toc-offset:16px;--toc-landing:96px;--fs-h2:28px;--fs-h3:22px}
  h1{font-size:38px}
  .head-tools{gap:12px;margin-left:auto}
  .lang span{display:none}
  .lang{min-width:28px;min-height:38px}
  .section{padding-top:48px;padding-bottom:48px}
  .grid-three,.grid-five{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  .no-break{white-space:normal}
  .tilt,[data-tilt]{transform:none!important}
  .decorated{max-width:100%}
  .grid-three,.grid-five,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .panel,.card{padding:20px}
  .footer-grid{gap:28px}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(max-width:380px){
  :root{--gutter:16px}
  .brand{font-size:var(--fs-body);gap:7px}
  .brand img{width:28px;height:28px}
  .head-tools{gap:8px}
  .btn-login{padding-inline:12px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal,.reveal.pending{opacity:1;transform:none}
}