:root{
  --bg:#E2EFF2;
  --bg-hero-top:#EEF6F8;
  --bg-hero-bottom:#DCEBEF;
  --panel:#F5FAFB;
  --panel-2:#D4E5EA;
  --panel-3:#E7F1F4;
  --surface:#FBFDFE;
  --white:#FFFFFF;
  --clear:transparent;
  --border:#C3D7DD;
  --border-soft:#D6E5E9;
  --ink-line:rgb(19 34 42 / .16);
  --accent:#C42D63;
  --accent-dark:#9A1F4C;
  --accent-rose:#EE94B5;
  --accent-14:rgb(196 45 99 / .14);
  --accent-24:rgb(196 45 99 / .24);
  --text:#13222A;
  --text-muted:#4E6168;
  --text-faint:#7F9299;
  --ink:#0F1B21;
  --success:#12825A;
  --success-12:rgb(18 130 90 / .12);
  --success-lit:#3CC994;
  --success-lit-18:rgb(60 201 148 / .18);
  --warn:#B7791F;
  --error:#C2362B;
  --win-top:#13222A;
  --win-bottom:#1C3038;
  --win-side:rgb(255 255 255 / .025);
  --win-chip:rgb(255 255 255 / .06);
  --win-chip-on:rgb(255 255 255 / .10);
  --win-line:rgb(255 255 255 / .07);
  --win-line-2:rgb(255 255 255 / .15);
  --win-hi:rgb(255 255 255 / .10);
  --win-edge:rgb(9 20 26 / .55);
  --win-sb:rgb(0 0 0 / .14);
  --win-text:#E4EEF1;
  --win-muted:#8EA3AA;
  --dot:rgb(19 34 42 / .06);
  --glow:rgb(247 252 253 / .95);
  --glow-2:rgb(214 236 241 / .55);
  --sh-1:rgb(19 52 64 / .06);
  --sh-12:rgb(19 62 76 / .12);
  --sh-18:rgb(19 62 76 / .18);
  --sh-cta:rgb(196 45 99 / .26);
  --laurel:#8B9DA3;
  --flag-white:#FFFFFF;
  --flag-red:#D7263D;
  --flag-hk:#DE2910;
  --flag-blue:#2A3B87;
  --flag-black:#1C1C1C;
  --flag-gold:#F4C430;
  --flag-edge:rgb(19 34 42 / .16);
  --veil:rgb(19 34 42 / .28);
  --r-pill:999px;
  --r:14px;
  --r-win:18px;
  --r-dot:50%;
  --font-display:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:"Inter","Noto Sans SC","Noto Sans JP","Noto Sans KR","PingFang SC","Hiragino Sans","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --gutter:32px;
  --head-height:68px;
  --anchor-offset:84px;
  --toc-offset:80px;
  --shadow-panel:0 1px 2px var(--sh-1),0 20px 48px -22px var(--sh-12);
  --ease-out:cubic-bezier(.2,.7,.2,1);
  --time-short:180ms;
  --time-reveal:600ms;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-offset);scroll-behavior:smooth}
html.nav-open{overflow:hidden}
body{
  margin:0;font-family:var(--font-body);color:var(--text);
  background-color:var(--bg);
  background-image:radial-gradient(circle at center,var(--dot) 1.1px,var(--clear) 1.7px),linear-gradient(180deg,var(--bg-hero-top) 0,var(--bg-hero-bottom) 860px,var(--bg) 1120px);
  background-size:22px 22px,100% 100%;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  line-height:1.7;
}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
img{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
[hidden]{display:none!important}
:where(a,button,summary,input,select,textarea,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
:where(h1,h2,h3){font-family:var(--font-display);line-height:1.25;text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,4.5vw,72px);font-weight:900;line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(26px,3vw,40px);font-weight:800;letter-spacing:-.015em}
h3{font-size:22px;font-weight:750}
p{margin:0 0 1em}
.wrap{max-width:1264px;margin-inline:auto;padding-inline:var(--gutter);min-width:0}
.section{padding-top:72px;padding-bottom:72px}
.section-heading{margin-top:0;margin-bottom:24px}
.section-note{max-width:760px;color:var(--text-muted)}
.no-break{white-space:nowrap}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-5{grid-template-columns:repeat(5,minmax(0,1fr))}
:where(.grid,.head-in,.footer-grid,.feature-browser)>*{min-width:0}
.panel,.card{min-width:0;border:1px solid var(--border);border-radius:var(--r);background:var(--panel);box-shadow:var(--shadow-panel);padding:24px}
.panel-inset{background:var(--panel-2);border-radius:var(--r);padding:24px;min-width:0}
.prose{max-width:880px;min-width:0}
.prose p,.prose li{overflow-wrap:break-word}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose a:not(.btn){color:var(--accent);text-decoration:underline;text-underline-offset:3px}
code{font-family:var(--font-mono);font-size:.9em;overflow-wrap:anywhere}
:not(pre)>code{background:var(--panel-2);padding:2px 5px;border-radius:var(--r)}
pre{max-width:100%;min-width:0;overflow-x:auto;overscroll-behavior-x:contain;background:var(--text);color:var(--win-text);border-radius:var(--r);padding:20px;line-height:1.65}
pre code{white-space:pre;overflow-wrap:normal}
.decorated,.hero,.blog-hero{position:relative;overflow-x:clip;max-width:100%}
#server-status{position:relative;display:block;min-height:160px;min-width:0;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:24px}
#server-status+*{margin-top:24px}
#server-status :where(.grid,ul){max-width:100%;min-width:0}
#server-status :where(.grid,ul)>*{min-width:0}
.reveal{transition:opacity var(--time-reveal) var(--ease-out),transform var(--time-reveal) var(--ease-out)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.count-number,[data-count]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:center}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:52px;padding:0 28px;border-radius:var(--r-pill);font-size:16px;font-weight:650;letter-spacing:.01em;line-height:1.25;white-space:nowrap;flex-shrink:0}
.btn svg{width:22px;height:22px;flex:none}
.btn-main,.btn-primary{
  color:var(--white);border:0 solid var(--clear);border-bottom-width:3px;
  background:linear-gradient(var(--ink),var(--ink)) padding-box,linear-gradient(90deg,var(--accent),var(--accent-rose)) border-box;
  box-shadow:0 14px 28px -14px var(--sh-cta),0 2px 6px var(--sh-1);
}
.btn-main:hover,.btn-primary:hover,.btn-main.is-hover{background:linear-gradient(var(--text),var(--text)) padding-box,linear-gradient(90deg,var(--accent),var(--accent-rose)) border-box}
.btn-sub,.btn-secondary{border:1.5px solid var(--border);background:var(--panel);color:var(--text)}
.btn-sub:hover,.btn-secondary:hover,.btn-sub.is-hover{border-color:var(--text-faint);background:var(--white)}
.btn:active,.btn.is-active{box-shadow:inset 0 2px 6px var(--sh-18)}
.btn.is-focus{outline:2px solid var(--accent);outline-offset:3px}
.btn:disabled,.btn[aria-disabled="true"]{opacity:.55}
.btn-small{min-height:44px;padding-inline:20px;font-size:14px}
.sh-f{fill:var(--white)}
.sh-c{fill:none;stroke:var(--ink);stroke-width:2.3;stroke-linecap:round;stroke-linejoin:round}
.arr{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.site-head{position:relative;z-index:10;border-bottom:1px solid var(--border-soft)}
.head-in{height:var(--head-height);display:flex;align-items:center;gap:32px;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:800;font-size:19px;letter-spacing:-.015em;color:var(--text);min-height:32px;white-space:nowrap}
.brand-mark{width:32px;height:32px;flex:none}
.brand-zh{font-size:15px;font-weight:500;color:var(--text-muted)}
.nav{margin:0 auto}
.nav ul{list-style:none;display:flex;align-items:center;margin:0;padding:0}
.nav li{display:flex;align-items:center}
.nav li+li::before{content:"·";color:var(--text-faint);margin:0 14px;font-weight:700}
.nav a{display:inline-flex;align-items:center;gap:7px;min-height:32px;padding:6px 2px;font-size:15px;font-weight:500;color:var(--text-muted);white-space:nowrap;line-height:1.4}
.nav a:hover{color:var(--text)}
.nav a[aria-current="page"]{color:var(--text);font-weight:650}
.nav-dot{width:7px;height:7px;border-radius:var(--r-dot);background:var(--accent);box-shadow:0 0 0 3px var(--accent-14);flex:none}
.head-tools{display:flex;align-items:center;gap:10px;flex-shrink:0;position:relative;z-index:14}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:7px;min-width:44px;width:auto;height:38px;padding:0 12px;border:0;border-radius:var(--r-pill);background:var(--clear);font:inherit;font-size:14px;color:var(--text-muted);cursor:pointer}
.lang:hover{background:var(--panel-2);color:var(--text)}
.lang svg{width:16px;height:16px;flex:none}
.lang-txt{white-space:nowrap}
.lang-caret{font-size:11px}
.lang-pop{position:absolute;right:0;top:calc(100% + 12px);width:200px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r);box-shadow:var(--shadow-panel)}
.lang-pop a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r);font-size:14px}
.lang-pop a:hover,.lang-pop a[aria-current="true"]{background:var(--panel-2)}
.nav-login{display:inline-flex;align-items:center;justify-content:center;height:38px;padding:0 20px;border-radius:var(--r-pill);border:1.5px solid var(--text);background:var(--panel);font-size:14.5px;font-weight:600;color:var(--text);white-space:nowrap}
.nav-login:hover{background:var(--white)}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid var(--border);border-radius:var(--r-pill);background:var(--panel);color:var(--text)}
.menu-toggle svg{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round}
.mobile-nav{display:none}
.nav-veil{display:none}
.site-footer{border-top:1px solid var(--border);padding-top:56px;padding-bottom:24px;background:linear-gradient(180deg,var(--clear),var(--panel-2))}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px}
.footer-brand p{margin-top:18px;max-width:330px;font-size:14px;color:var(--text-muted)}
.footer-title{font-size:14px;margin:0 0 12px;font-weight:750}
.footer-links{display:grid;gap:5px;margin:0;padding:0;list-style:none}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:14px;color:var(--text-muted)}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid var(--border);margin-top:36px;padding-top:20px;font-size:13px;color:var(--text-muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:28px}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
@media(max-width:1200px){
  .head-in{gap:20px}
  .nav li+li::before{margin-inline:9px}
}
@media(max-width:1060px){
  .nav{display:none}
  .head-tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-nav{position:absolute;z-index:13;top:var(--head-height);left:0;right:0;display:block;max-height:calc(100dvh - var(--head-height));overflow-y:auto;overscroll-behavior:contain;padding:16px var(--gutter) 24px;background:var(--panel);border-bottom:1px solid var(--border);box-shadow:var(--shadow-panel)}
  .mobile-nav a{display:flex;width:100%;align-items:center;gap:10px;min-height:44px;padding:12px 16px;border-radius:var(--r);color:var(--text-muted)}
  .mobile-nav a:hover,.mobile-nav a[aria-current="page"]{background:var(--panel-2);color:var(--text)}
  .mobile-nav ul{list-style:none;margin:0;padding:0}
  .mobile-languages{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}
  .nav-veil:not([hidden]){display:block;position:fixed;z-index:11;inset:var(--head-height) 0 0;background:var(--veil);border:0;width:100%;padding:0}
  .grid-5{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:768px){
  h1{font-size:36px}
  .grid-3,.grid-5{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .section{padding-top:48px;padding-bottom:48px}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  h1{font-size:32px}
  .head-in{gap:12px}
  .head-tools{margin-left:auto;gap:4px}
  .brand{font-size:17px;gap:7px}
  .brand-mark{width:28px;height:28px}
  .brand-zh{display:none}
  .lang-txt{display:none}
  .lang{padding-inline:8px;min-height:44px}
  .nav-login{padding-inline:14px;min-height:44px}
  .grid-3,.grid-5,.footer-grid{grid-template-columns:minmax(0,1fr)}
  .panel,.card,.panel-inset{padding:20px}
  .tilt{transform:none}
  .decorated,.hero,.blog-hero{max-width:100%}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none;transition:none}
}