:root{
  --bg:#F7F6F4;
  --panel:#FFFFFF;
  --panel-2:#EFEDEA;
  --border:#E2DFDA;
  --accent:#D1335B;
  --accent-dark:#A51F43;
  --apricot:#F6B98A;
  --text:#1A1820;
  --muted:#625E68;
  --success:#1E8E5A;
  --warn:#C98512;
  --error:#C62828;
  --win:#14172B;
  --win-2:#191D34;
  --win-3:#242944;
  --win-deep:#0F1225;
  --win-text:#ECEAF2;
  --win-muted:#A3A5BC;
  --win-dim:#72758F;
  --win-ok:#5CC497;
  --win-hair:rgba(255,255,255,.07);
  --win-hair-2:rgba(255,255,255,.13);
  --win-sheen:rgba(255,255,255,.055);
  --glass:rgba(255,255,255,.56);
  --glass-hi:rgba(255,255,255,.95);
  --hi-soft:rgba(255,255,255,.22);
  --veil:rgba(26,24,32,.34);
  --flag-red:#C9283F;
  --flag-blue:#2B3A73;
  --flag-white:#FFFFFF;
  --flag-black:#26221F;
  --flag-gold:#E3B23C;
  --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","Microsoft YaHei",system-ui,sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --r-xs:4px;
  --r-s:6px;
  --r-btn:7px;
  --r-m:10px;
  --r-win:12px;
  --r-l:16px;
  --r-bubble:22px;
  --r-frame:24px;
  --r-pill:999px;
  --tint-shadow:color-mix(in srgb,var(--accent) 10%,transparent);
  --tint-shadow-strong:color-mix(in srgb,var(--accent) 18%,transparent);
  --ink-shadow:color-mix(in srgb,var(--text) 10%,transparent);
  --shadow-panel:inset 0 1px 0 var(--glass-hi),0 24px 64px -24px var(--tint-shadow);
  --gutter:24px;
  --content:1200px;
  --reading:780px;
  --header-h:64px;
  --anchor-gap:84px;
  --toc-offset:148px;
  --size-body:16px;
  --size-small:14px;
  --size-h1:clamp(52px,5vw,64px);
  --size-h2:clamp(28px,3vw,40px);
  --size-h3:22px;
  --weight-display:800;
  --ease:cubic-bezier(.2,.7,.3,1);
  --speed:.18s;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:var(--anchor-gap);scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font-body);font-size:var(--size-body);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
button,input,textarea,select{border-radius:var(--r-s)}
button{border:0}
img,video{display:block;max-width:100%;height:auto}
svg{flex-shrink:0}
ul{padding-left:1.4em}
h1,h2,h3{font-family:var(--font-display);text-wrap:balance;overflow-wrap:break-word}
h1{font-size:var(--size-h1);line-height:1.12;font-weight:var(--weight-display);letter-spacing:-.02em;margin:0 0 24px}
h2{font-size:var(--size-h2);line-height:1.22;letter-spacing:-.02em;margin:0 0 24px}
h3{font-size:var(--size-h3);line-height:1.35;margin:0 0 16px}
p{margin:0 0 20px}
:focus-visible{outline:2px solid var(--text);outline-offset:3px;border-radius:var(--r-xs)}
[hidden]{display:none!important}
.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}
.no-break{white-space:nowrap}
.wrap{width:100%;max-width:var(--content);margin-inline:auto;padding-inline:var(--gutter)}
.reading-wrap{width:100%;max-width:var(--reading);margin-inline:auto;padding-inline:var(--gutter)}
.sec{padding-top:80px;padding-bottom:80px}
.section-head{max-width:760px;margin:0 auto 36px;text-align:center}
.muted{color:var(--muted)}
.kicker{font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--muted);margin-bottom:12px}
.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))}
.grid>*{min-width:0}
.panel,.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--r-l);box-shadow:var(--shadow-panel);padding:28px;min-width:0}
.prose{overflow-wrap:break-word}
.prose h2{margin-top:56px}
.prose h3{margin-top:32px}
.prose a:not(.btn){text-decoration:underline;text-underline-offset:3px}
.prose li{margin-block:8px}
code{font-family:var(--font-mono);font-size:.88em;overflow-wrap:anywhere;background:var(--panel-2);border-radius:var(--r-xs);padding:.12em .3em}
pre{max-width:100%;overflow-x:auto;padding:20px;background:var(--win);color:var(--win-text);border-radius:var(--r-m)}
pre code{white-space:pre;overflow-wrap:normal;background:transparent;padding:0}
section[id]{scroll-margin-top:var(--anchor-gap)}
.btn,.btn-primary,.btn-secondary,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 24px;font-size:15px;font-weight:600;border:1px solid transparent;white-space:nowrap;flex-shrink:0;transition:background-color var(--speed),color var(--speed),filter var(--speed)}
.btn-primary{border-radius:var(--r-btn);background:linear-gradient(180deg,color-mix(in srgb,var(--accent) 88%,var(--panel)),var(--accent) 48%,color-mix(in srgb,var(--accent) 78%,var(--accent-dark)));color:var(--panel);box-shadow:inset 0 1px 0 var(--hi-soft),0 8px 18px -8px color-mix(in srgb,var(--accent) 60%,transparent);font-weight:700}
.btn-primary:hover{filter:brightness(.94)}
.btn-secondary{border-radius:var(--r-btn);background:var(--text);color:var(--panel);box-shadow:inset 0 1px 0 var(--hi-soft)}
.btn-secondary:hover{background:var(--win-3)}
.btn-ghost{height:54px;padding-inline:26px;border:1.5px solid var(--text);border-radius:var(--r-pill);background:color-mix(in srgb,var(--panel) 45%,transparent);color:var(--text)}
.btn-ghost:hover{background:var(--text);color:var(--panel)}
.btn svg,.btn-ghost svg{width:16px;height:16px}
button:disabled,.btn[aria-disabled="true"]{opacity:.5;cursor:not-allowed;box-shadow:none}
.reveal{transition:opacity .35s var(--ease),transform .35s var(--ease)}
.reveal.pending{opacity:0;transform:translateY(16px)}
.reveal.shown{opacity:1;transform:none}
#server-status{position:relative;display:block;min-height:160px;width:100%;max-width:100%;overflow:hidden;margin-top:24px;margin-bottom:32px}
#server-status>*{min-width:0;max-width:100%}
#server-status+*{margin-top:32px}
[data-counter]{display:inline-block;min-width:3ch;font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}
.topbar{position:relative;z-index:60}
.topbar__inner{max-width:1288px;margin:0 auto;height:var(--header-h);padding:0 32px;display:flex;align-items:center;gap:36px;flex-wrap:nowrap}
.brand{display:flex;align-items:center;gap:10px;flex:none;min-height:30px}
.brand__mark{display:block;width:30px;height:30px;flex:none;filter:drop-shadow(0 4px 8px var(--ink-shadow))}
.brand__word{font-family:var(--font-display);font-weight:800;font-size:17px;letter-spacing:-.02em;color:var(--text);white-space:nowrap}
.mainnav{flex:1;min-width:0}
.mainnav__list{display:flex;align-items:center;list-style:none;margin:0;padding:0;gap:2px}
.mainnav__link,.mainnav__trigger{display:inline-flex;align-items:center;justify-content:center;gap:5px;height:36px;padding:0 12px;border:0;border-radius:var(--r-s);background:transparent;font-size:14.5px;font-weight:500;color:var(--muted);cursor:pointer;white-space:nowrap;transition:color var(--speed),background-color var(--speed)}
.mainnav__link:hover,.mainnav__trigger:hover{color:var(--text);background:color-mix(in srgb,var(--text) 5%,transparent)}
.mainnav__link[aria-current="page"],.mainnav__trigger.is-current{color:var(--text);font-weight:600}
.mainnav__more{position:relative}
.mainnav__trigger svg{width:10px;height:10px}
.mainnav__panel{position:absolute;top:calc(100% + 8px);left:-6px;z-index:80;min-width:248px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-m);box-shadow:0 18px 40px -16px var(--tint-shadow-strong),0 2px 6px var(--ink-shadow)}
.mainnav__group{padding:6px 10px 4px;font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--muted)}
.mainnav__item{display:block;padding:10px;border-radius:var(--r-s);font-size:14px;font-weight:600;color:var(--text);min-height:44px}
.mainnav__item:hover,.mainnav__item[aria-current="page"]{background:var(--panel-2)}
.topbar__tools{margin-left:auto;display:flex;align-items:center;gap:6px;flex-shrink:0}
.langpick{position:relative}
.langbtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:36px;width:auto;min-width:44px;padding:0 10px;border:0;border-radius:var(--r-s);background:transparent;font-size:14px;color:var(--muted);cursor:pointer;white-space:nowrap}
.langbtn span{white-space:nowrap}
.langbtn svg{width:15px;height:15px}
.langbtn:hover{background:var(--panel-2);color:var(--text)}
.langpanel{position:absolute;z-index:90;top:calc(100% + 10px);right:0;width:180px;padding:6px;background:var(--panel);border:1px solid var(--border);border-radius:var(--r-m);box-shadow:var(--shadow-panel)}
.langpanel a{display:flex;align-items:center;min-height:44px;padding:8px 12px;border-radius:var(--r-s)}
.langpanel a:hover,.langpanel a[aria-current="true"]{background:var(--panel-2)}
.loginbtn{display:inline-flex;align-items:center;justify-content:center;height:36px;padding:0 18px;border-radius:var(--r-s);background:var(--text);color:var(--panel);font-size:14px;font-weight:600;white-space:nowrap;box-shadow:inset 0 1px 0 var(--hi-soft),0 6px 14px -8px var(--ink-shadow)}
.loginbtn:hover{background:var(--win)}
.menu-toggle{display:none;align-items:center;justify-content:center;flex-direction:column;gap:4px;min-width:44px;min-height:44px;padding:10px;border-radius:var(--r-s);background:transparent;color:var(--text)}
.menu-toggle__line{display:block;width:20px;height:2px;background:currentColor;border-radius:var(--r-xs)}
.mobile-drawer{display:none}
.nav-veil{display:none}
html.nav-open{overflow:hidden}
.site-footer{border-top:1px solid var(--border);background:linear-gradient(180deg,var(--bg),var(--panel-2));padding-top:56px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
.footer-brand p{max-width:300px;margin-top:18px;color:var(--muted);font-size:14px}
.footer-heading{font-size:14px;font-weight:700;margin:0 0 14px}
.footer-links{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.footer-links a{display:inline-flex;align-items:center;min-height:28px;font-size:14px;color:var(--muted);padding-block:3px}
.footer-links a:hover{color:var(--text);text-decoration:underline;text-underline-offset:4px}
.footer-bottom{margin-top:40px;padding-top:20px;border-top:1px solid var(--border);display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;font-size:13px;color:var(--muted)}
.footer-legal{display:flex;flex-wrap:wrap;gap:20px}
.footer-legal a{display:inline-flex;align-items:center;min-height:24px}
@media(max-width:1100px){
  .topbar__inner{gap:20px;padding-inline:24px}
  .mainnav__link,.mainnav__trigger{padding-inline:8px;font-size:14px}
  .langbtn{font-size:12px;padding-inline:6px}
}
@media(max-width:900px){
  .mainnav{display:none}
  .topbar__inner{gap:12px}
  .topbar__tools{margin-left:auto}
  .menu-toggle{display:inline-flex}
  .mobile-drawer{position:fixed;z-index:55;top:var(--header-h);right:0;left:0;height:calc(100dvh - var(--header-h));max-height:calc(100dvh - var(--header-h));padding:20px var(--gutter) 40px;background:var(--panel);overflow-y:auto;overscroll-behavior:contain;border-top:1px solid var(--border)}
  .mobile-drawer:not([hidden]){display:block}
  .mobile-drawer a{display:flex;align-items:center;width:100%;min-height:44px;padding:12px 16px;border-radius:var(--r-s);color:var(--text)}
  .mobile-drawer a:hover,.mobile-drawer a[aria-current="page"]{background:var(--panel-2)}
  .mobile-drawer__languages{border-top:1px solid var(--border);padding-top:16px;margin-top:16px}
  .mobile-drawer__label{font-size:12px;color:var(--muted);padding:8px 16px}
  .nav-veil:not([hidden]){display:block;position:fixed;z-index:50;inset:var(--header-h) 0 0;background:var(--veil)}
  .grid--five{grid-template-columns:repeat(3,minmax(0,1fr))}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:768px){
  :root{--size-h1:clamp(28px,7vw,40px)}
  .sec{padding-top:56px;padding-bottom:56px}
  .grid--three{grid-template-columns:1fr}
}
@media(max-width:640px){
  :root{--gutter:16px}
  .no-break{white-space:normal}
  .topbar__inner{padding-inline:16px;gap:6px}
  .brand{gap:6px}
  .brand__mark{width:25px;height:25px}
  .brand__word{font-size:14px}
  .topbar__tools{margin-left:auto;gap:2px}
  .loginbtn{padding-inline:12px;font-size:13px}
  .langbtn{padding-inline:5px;min-width:28px}
  .langbtn span{display:none}
  .panel,.card{padding:20px}
  .grid--five{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{gap:28px 20px}
  .footer-brand{grid-column:1/-1}
  .tilt,[data-tilt]{transform:none}
  .decorative-zone{overflow-x:clip;max-width:100%}
}
@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}
}