:root{
  --bg:#E7EDF7;--hero-top:#EEF2FA;--hero-bottom:#E1E8F4;
  --panel:#F7F9FD;--panel-2:#DAE3F1;--panel-3:#EDF1F8;
  --ice:#E3EBF8;--ice-edge:#CDD9EC;--border:#C9D4E6;--border-soft:#D9E1EE;
  --accent:#C7286A;--accent-dark:#96194E;
  --accent-10:rgba(199,40,106,.10);--accent-12:rgba(199,40,106,.12);--accent-14:rgba(199,40,106,.14);--accent-30:rgba(199,40,106,.30);
  --text:#141A2B;--text-muted:#56617A;--text-faint:#8D97AC;--ink-btn-top:#283049;
  --success:#1E9E6A;--success-ink:#167A52;--success-14:rgba(30,158,106,.14);--success-24:rgba(30,158,106,.24);
  --warn:#C98512;--error:#D23A2E;
  --white:#FFFFFF;--clear:transparent;--white-0:rgba(255,255,255,0);--white-04:rgba(255,255,255,.04);--white-06:rgba(255,255,255,.06);--white-08:rgba(255,255,255,.08);--white-12:rgba(255,255,255,.12);--white-14:rgba(255,255,255,.14);--white-18:rgba(255,255,255,.18);--white-22:rgba(255,255,255,.22);--white-40:rgba(255,255,255,.40);--white-60:rgba(247,249,253,.60);--white-70:rgba(255,255,255,.70);
  --ink-05:rgba(20,26,43,.05);--ink-12:rgba(20,26,43,.12);--ink-14:rgba(20,26,43,.14);--ink-22:rgba(20,26,43,.22);--ink-35:rgba(20,26,43,.35);--ink-45:rgba(14,18,32,.45);--veil:rgba(20,26,43,.35);--dot:rgba(20,26,43,.05);
  --win-1:#161C2E;--win-2:#1C2338;--win-side:rgba(8,11,22,.28);--win-status:rgba(8,11,22,.32);--win-line:rgba(255,255,255,.06);--win-edge:rgba(8,11,22,.50);
  --win-text:#E7ECF6;--win-muted:#97A1B8;--win-faint:#636D86;--win-type:#AEC0E2;--win-dot-1:#3B4359;--win-dot-2:#4A5269;--win-dot-3:#596279;
  --plate-1:#DDE6F3;--plate-2:#C9D6EA;--laurel:#8C95A7;
  --flag-red:#D7263D;--flag-jp:#BC1F33;--flag-white:#FFFFFF;--flag-blue:#2A3E8F;--flag-navy:#1E2A6E;
  --radius-pill:999px;--radius-plate:28px;--radius-browser:14px;--radius-win:12px;--radius-sm:8px;--radius-xs:6px;--radius-line:3px;--radius-round:50%;
  --font-display:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Apple SD Gothic Neo','Microsoft YaHei',system-ui,sans-serif;
  --font-body:'Inter','Noto Sans SC','PingFang SC','Hiragino Sans','Yu Gothic','Apple SD Gothic Neo','Malgun Gothic','Microsoft YaHei',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,'SFMono-Regular',Menlo,Consolas,monospace;
  --weight-body:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--weight-brand:800;--weight-display:900;
  --size-body:16px;--size-small:14px;--size-h1:68px;--size-h2:36px;--size-h3:23px;
  --gutter:24px;--content-width:1160px;--header-height:64px;--anchor-offset:80px;--toc-offset:144px;
  --ease-fast:.2s;--ease-reveal:.35s;
  --shadow-panel:inset 0 1px 0 var(--white),0 24px 64px -20px var(--accent-10);
  --shadow-button:inset 0 1px 0 var(--white-22),0 14px 28px -8px var(--ink-14),0 3px 8px -2px var(--ink-22);
}
*,*::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-width:320px;font-family:var(--font-body);font-size:var(--size-body);font-weight:var(--weight-body);line-height:1.6;color:var(--text);background-color:var(--bg);background-image:radial-gradient(circle,var(--dot) 1.15px,var(--clear) 1.55px),linear-gradient(180deg,var(--hero-top) 0,var(--hero-bottom) 860px,var(--bg) 1100px);background-size:22px 22px,100% 1100px;background-repeat:repeat,no-repeat;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
a:hover{color:var(--accent-dark)}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
button{border:0;background:var(--clear)}
img,video{max-width:100%;height:auto}
svg{vertical-align:middle;flex-shrink:0}
[hidden]{display:none!important}
:where(a,button,input,select,textarea,summary,[tabindex]):focus-visible{outline:2px solid var(--accent);outline-offset:3px}
h1,h2,h3,h4{font-family:var(--font-display);color:var(--text);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:clamp(52px,5vw,72px);font-weight:var(--weight-display);line-height:1.12;letter-spacing:-.02em;margin:0 0 24px}
h2{font-size:var(--size-h2);font-weight:var(--weight-brand);line-height:1.25;letter-spacing:-.02em;margin:0 0 24px}
h3{font-size:var(--size-h3);font-weight:var(--weight-bold);line-height:1.35;margin:0 0 16px}
p{margin:0 0 20px}
strong{font-weight:var(--weight-bold)}
ul,ol{padding-inline-start:24px}
li+li{margin-top:6px}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere;word-break:break-word;background:var(--panel-2);border-radius:var(--radius-line);padding:2px 5px}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--win-1);color:var(--win-text);border-radius:var(--radius-win);-webkit-overflow-scrolling:touch}
pre code{padding:0;background:var(--clear);color:inherit;overflow-wrap:normal;word-break:normal;white-space:pre}
hr{border:0;border-top:1px solid var(--border);margin:32px 0}
.wrap{width:100%;max-width:var(--content-width);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-top:72px;padding-bottom:72px}
.section-head{max-width:760px;margin-bottom:32px}
.muted{color:var(--text-muted)}
.mono{font-family:var(--font-mono)}
.no-break{white-space:nowrap}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.stk{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.icon{width:20px;height:20px;flex:none}
.grid{display:grid;gap:24px}
.grid>*,:where(.wrap,.panel,.card,.prose,.footer-grid)>*{min-width:0}
.grid-three{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-two{grid-template-columns:repeat(2,minmax(0,1fr))}
.panel,.card{min-width:0;background:var(--panel);border:1px solid var(--border-soft);border-radius:var(--radius-browser);box-shadow:var(--shadow-panel);padding:28px}
.card h3 a{color:var(--text)}
.prose{max-width:800px;min-width:0;overflow-wrap:break-word}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose p,.prose li{line-height:1.85}
.prose a{text-decoration:underline;text-underline-offset:3px}
.decor-region{position:relative;overflow-x:clip}
.decor-layer{position:absolute;inset:0;pointer-events:none;max-width:100%}
.counter-stat,[data-count]{display:inline-block;min-width:3ch;font-variant-numeric:tabular-nums;font-family:var(--font-display);text-align:center}
#server-status{position:relative;display:block;min-height:160px;max-width:100%;overflow:hidden;margin-block:24px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
.reveal{transition:opacity var(--ease-reveal) ease,transform var(--ease-reveal) ease}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
.btn,.btn-primary,.btn-ghost,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:10px 22px;border-radius:var(--radius-pill);font-size:17px;font-weight:var(--weight-bold);line-height:1.4;white-space:nowrap;flex-shrink:0;text-align:center;transition:transform var(--ease-fast),border-color var(--ease-fast),background-color var(--ease-fast)}
.btn-primary{height:52px;padding:0 22px 0 20px;background:linear-gradient(180deg,var(--ink-btn-top),var(--text));color:var(--white);box-shadow:var(--shadow-button)}
.btn-primary:hover{color:var(--white);transform:translateY(-1px)}
.btn-primary .ico-globe{width:18px;height:18px}
.btn-primary .ico-arrow{width:17px;height:17px;transition:transform var(--ease-fast)}
.btn-primary:hover .ico-arrow{transform:translateX(3px)}
.btn-ghost,.btn-secondary{height:52px;padding:0 24px;border:1.5px solid var(--border);background:var(--white-60);color:var(--text);font-weight:var(--weight-semibold)}
.btn-ghost:hover,.btn-secondary:hover{border-color:var(--text-faint);background:var(--panel);color:var(--text)}
.btn-ghost svg{width:16px;height:16px;color:var(--text-muted)}
.btn-primary:active,.btn-primary.is-active{transform:translateY(1px);background:var(--text)}
.btn-primary:disabled,.btn-primary[aria-disabled="true"],.btn-ghost:disabled{opacity:.5;pointer-events:none}
.cta-row{display:flex;justify-content:center;flex-wrap:wrap;gap:16px;margin:0 0 24px}
.topbar{position:relative;z-index:50}
.topbar-in{width:min(1280px,calc(100% - 48px));margin:0 auto;height:var(--header-height);display:flex;align-items:center;gap:24px;flex-wrap:nowrap}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none;font-family:var(--font-display);font-weight:var(--weight-brand);font-size:19px;letter-spacing:-.02em;color:var(--text);white-space:nowrap}
.brand:hover{color:var(--text)}
.brand-mark{width:32px;height:32px;flex:none}
.brand-zh{font-size:.85em;font-weight:var(--weight-medium);color:var(--text-muted)}
.mainnav{margin:0 auto;flex:1;min-width:0}
.mainnav ul{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px;justify-content:center}
.mainnav li{margin:0;min-width:0}
.mainnav a{display:flex;align-items:center;gap:6px;height:36px;padding:0 11px;border-radius:var(--radius-pill);font-size:14px;font-weight:var(--weight-medium);color:var(--text-muted);white-space:nowrap;transition:background-color var(--ease-fast),color var(--ease-fast)}
.mainnav a:hover{color:var(--text);background:var(--ink-05)}
.mainnav a[aria-current="page"]{color:var(--text);font-weight:var(--weight-semibold);background:var(--panel);box-shadow:inset 0 1px 0 var(--white),0 0 0 1px var(--border-soft)}
.nav-ico{width:16px;height:16px;flex:none}
.tag-new{font-size:11px;font-weight:var(--weight-bold);line-height:1;padding:3px 6px;border-radius:var(--radius-pill);background:var(--success-14);color:var(--success-ink);white-space:nowrap;flex:none}
.dot-new{width:7px;height:7px;flex:none;border-radius:var(--radius-round);background:var(--accent);box-shadow:0 0 0 3px var(--accent-14)}
.topbar-tools{display:flex;align-items:center;gap:8px;flex-shrink:0}
.language-picker{position:relative;flex:none}
.lang{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:44px;width:auto;height:36px;padding:0 12px;border-radius:var(--radius-pill);font-size:14px;color:var(--text-muted);white-space:nowrap}
.lang-name{white-space:nowrap}
.lang:hover{background:var(--ink-05);color:var(--text)}
.lang svg{width:16px;height:16px}
.language-panel{position:absolute;z-index:80;right:0;top:calc(100% + 10px);width:180px;padding:8px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius-browser);box-shadow:var(--shadow-panel)}
.language-panel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--radius-sm);color:var(--text);font-size:14px}
.language-panel a:hover,.language-panel a[aria-current="true"]{background:var(--panel-2)}
.btn-login{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 18px 0 14px;border-radius:var(--radius-pill);background:var(--panel);border:1px solid var(--border);font-size:14px;font-weight:var(--weight-semibold);color:var(--text);white-space:nowrap;box-shadow:inset 0 1px 0 var(--white),0 6px 14px -8px var(--ink-22);transition:border-color var(--ease-fast)}
.btn-login:hover{border-color:var(--text-faint);color:var(--text)}
.btn-login svg{width:16px;height:16px}
.menu-toggle{display:none;align-items:center;justify-content:center;min-width:44px;min-height:44px;color:var(--text);border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--panel)}
.menu-toggle svg{width:22px;height:22px}
.menu-toggle[aria-expanded="true"]{background:var(--panel-2)}
.mobile-drawer{display:none;position:fixed;z-index:45;top:var(--header-height);right:0;left:0;height:calc(100dvh - var(--header-height));max-height:calc(100dvh - var(--header-height));overflow-y:auto;overscroll-behavior:contain;background:var(--panel);padding:16px var(--gutter) 32px}
.mobile-drawer a{display:flex;align-items:center;gap:10px;width:100%;min-height:46px;padding:10px 14px;border-radius:var(--radius-sm);color:var(--text)}
.mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--panel-2)}
.drawer-languages{border-top:1px solid var(--border);margin-top:16px;padding-top:16px}
.drawer-languages a[aria-current="true"]{color:var(--accent);font-weight:var(--weight-bold)}
.nav-veil{display:none;position:fixed;z-index:40;inset:var(--header-height) 0 0;background:var(--veil)}
html.nav-open{overflow:hidden}
.site-footer{padding-top:56px;padding-bottom:28px;border-top:1px solid var(--border);background:var(--white-18)}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:48px}
.footer-brand p{margin-top:20px;max-width:360px;color:var(--text-muted);font-size:14px}
.footer-title{margin:0 0 14px;font-size:16px;font-weight:var(--weight-bold)}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 16px;list-style:none;padding:0;margin:0}
.footer-links li{margin:0;min-width:0}
.footer-links a{display:inline-flex;align-items:center;min-height:30px;font-size:14px;color:var(--text-muted);overflow-wrap:anywhere}
.footer-links a:hover{color:var(--accent)}
.footer-languages{display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:32px}
.footer-languages a{display:inline-flex;align-items:center;min-height:30px;font-size:14px;color:var(--text-muted)}
.footer-languages a[aria-current="true"]{color:var(--accent);font-weight:var(--weight-semibold)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:24px;padding-top:24px;border-top:1px solid var(--border);font-size:13px;color:var(--text-muted)}
.footer-bottom p{margin:0}
.legal-links{display:flex;flex-wrap:wrap;gap:16px}
.legal-links a{display:inline-flex;align-items:center;min-height:28px;color:var(--text-muted)}
@media(min-width:1101px) and (max-width:1350px){
  .topbar-in{gap:14px}.mainnav a{padding-inline:7px;gap:5px;font-size:13px}.topbar-tools{gap:4px}.lang{padding-inline:8px}.brand{font-size:18px}
}
@media(max-width:1100px){
  .mainnav{display:none}.topbar-tools{margin-left:auto}.menu-toggle{display:inline-flex}
  html.nav-open .mobile-drawer,html.nav-open .nav-veil{display:block}
}
@media(max-width:768px){
  h1{font-size:clamp(28px,6vw,40px);line-height:1.15}
  h2{font-size:28px}h3{font-size:21px}
  .section{padding-top:48px;padding-bottom:48px}
  .grid-three,.grid-two{grid-template-columns:minmax(0,1fr)}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer-links{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .topbar-in{width:calc(100% - 32px);gap:8px}
  .brand{font-size:16px;gap:7px}.brand-mark{width:28px;height:28px}
  .topbar-tools{gap:4px;margin-left:auto}
  .lang{padding-inline:8px}.lang-name{display:none}
  .btn-login{padding:0 10px;gap:4px;font-size:13px}
  .btn-login svg{display:none}
  .panel,.card{padding:20px}
  .tilt,[data-tilt]{transform:none}
  .decor-layer{max-width:100%}
  .cta-row{gap:10px}.btn-primary,.btn-ghost,.btn-secondary{font-size:15px;padding-inline:18px}
  .footer-bottom{align-items:flex-start;flex-direction:column}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:0s!important;animation-duration:0s!important;animation-iteration-count:1!important}
  .reveal,.reveal.pending,.reveal.shown{opacity:1;transform:none}
}